{"title":"Calibrated Gems","description":"","products":[{"product_id":"faceted-luag-fancy-singles-calibrated-rounds-squares-and-trillions-lutetium-aluminum-garnet","title":"LuAG Lumogarnet Faceted Loose Gems","description":"\u003cp\u003eThese are faceted labmade LuAG (Lutetium Aluminum Garnet). We have calibrated rounds, squares and trillions, as well as individual fancy cut stones.  Each fancy cut stone has its own individual photo and they can be purchased individually. The variation dropdown shows the carat weight and measurements of each stone, with the individual fancy cuts at the bottom below the calibrated cuts.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eLuAG is an exotic lab-created crystal with the same structure as natural garnets, but a composition and properties which are impossible in nature, particularly its outrageously strong green fluorescence which makes it glow when exposed to sunlight and even some indoor light. This is what we call a 'lumogarnet' - a lab created garnet with incredible fluorescence, designed to help detect invisible radiation. This is one of my favorite synthetic materials--brilliant and hard enough for use in all jewelry (mohs 8.5!).\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe fluorescence really is crazy--even normal room lights will make a LuAG gem fluoresce, and outdoors with indirect sunlight can make it look like it is photoshopped into real life. A blacklight aimed directly at it makes it insanely bright. It is just a great material overall, perfect for the collector and jeweler alike.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"2mm Round (avg. 0.05ct)","offer_id":47104922583328,"sku":"Gem_LuAG_Round_2","price":8.0,"currency_code":"USD","in_stock":false},{"title":"2.5 mm Round (avg. 0.15ct)","offer_id":51752610890016,"sku":"Gem_LuAG_Round_2.5","price":11.0,"currency_code":"USD","in_stock":true},{"title":"3mm Round (avg. 0.25ct)","offer_id":48447599149344,"sku":"Gem_LuAG_Round_3","price":16.0,"currency_code":"USD","in_stock":true},{"title":"4mm Round (avg. 0.5ct)","offer_id":45740098224416,"sku":"Gem_LuAG_Round_4","price":22.0,"currency_code":"USD","in_stock":true},{"title":"5mm Round (avg. 1.1ct)","offer_id":45740098257184,"sku":"Gem_LuAG_Round_5","price":44.0,"currency_code":"USD","in_stock":true},{"title":"6mm Round (avg. 1.8ct)","offer_id":45740098289952,"sku":"Gem_LuAG_Round_6","price":72.0,"currency_code":"USD","in_stock":true},{"title":"7mm Round (avg. 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11ct","offer_id":51269232132384,"sku":"Gem_LuAG01920251112","price":398.0,"currency_code":"USD","in_stock":true},{"title":"Parallel Bar, 10.6x8.7mm, 11.9ct","offer_id":51269232165152,"sku":"Gem_LuAG00420251112","price":426.0,"currency_code":"USD","in_stock":true},{"title":"Wide Cushion, 13.5x10mm, 12ct","offer_id":51269232197920,"sku":"Gem_LuAG01420251112","price":429.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 13.5x7.9mm, 12ct","offer_id":51269232230688,"sku":"Gem_LuAG02320251112","price":429.0,"currency_code":"USD","in_stock":true},{"title":"Checkered Diamond, 14.2x9.6mm, 12.1ct","offer_id":51269232263456,"sku":"Gem_LuAG02120251112","price":432.0,"currency_code":"USD","in_stock":true},{"title":"Square, 10.3mm, 13ct","offer_id":51269232296224,"sku":"Gem_LuAG02220251112","price":460.0,"currency_code":"USD","in_stock":true},{"title":"Coffin, 12.5*6.6mm, 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9.7mm, 9.5ct","offer_id":51383293837600,"sku":"Gem_LuAG00820260326","price":412.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 10.9mm, 7.8ct","offer_id":51383293870368,"sku":"Gem_LuAG00920260326","price":342.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 11mm, 8.5ct","offer_id":51383293903136,"sku":"Gem_LuAG01020260326","price":371.0,"currency_code":"USD","in_stock":true},{"title":"Spiral Trillion, 11.3mm, 9.5ct","offer_id":51383293935904,"sku":"Gem_LuAG01120260326","price":412.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/LuAG_Lumogarnet_Gemstones_FrontPhoto.jpg?v=1780019452"},{"product_id":"nd-color-change-laser-garnet-loose-gems","title":"Pink Laser Garnet, Nd+ YAG in Violet, Pink and Peach","description":"\u003cp\u003e These are color change Nd+ laser garnets (Nd:YAG), which are light violet, pink or peach in normal lighting and turn a pale yellow under fluorescent illumination. Each individual stone is labelled with its carat weight and letter in the photo and they can be purchased individually.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThis is next-gen Nd+ laser YAG, a type of lab created garnet used widely in lasers.  The original Nd YAG has been used in lasers since 1964, but the old formula only contained Nd and was all the same shade of purple-pink.  This material is a newer, more advanced formulation with extra elements like Ce added to broaden the accepted wavelengths for lasing thus making the lasers more powerful, and these add another dimension to the color.  In natural light they vary from purple to pink to peach, and under fluorescent lighting they change to near colorless or a pale orange-yellow.  These stones have been compared to Mahenge garnets and pastel pyropes.\u003c\/p\u003e\n\u003cp\u003eNote this color change is the exact opposite of Holmium laser YAG, and if you pair the two you can do a neat color swap magic trick.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith a hardness of 8.5 it is ideal for use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"violet \/ 3mm Round Cut (avg 0.15ct)","offer_id":49519814902048,"sku":"Gem_YAGNd_Viol_Rnd_3","price":8.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 4mm round Cut (avg 0.4ct)","offer_id":49519810871584,"sku":"Gem_YAGNd_Viol_Rnd_4","price":12.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ 5mm Round Cut (avg 0.8ct)","offer_id":49519810937120,"sku":"Gem_YAGNd_Viol_Rnd_5","price":24.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ 6mm Round Cut (avg. 1ct)","offer_id":49519811002656,"sku":"Gem_YAGNd_Viol_Rnd_6","price":30.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 7mm Round Cut (avg. 2ct)","offer_id":49519811035424,"sku":"Gem_YAGNd_Viol_Rnd_7","price":60.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ 8mm 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We were able to get some leftover offcuts from a laser crystal grower--these were not produced for the gem trade but they make for incredible gems.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e0923\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Bubbly \/ 4mm Round (~0.3 ct)","offer_id":50871283450144,"sku":"Gem_SphTiBub_Rnd_4","price":14.0,"currency_code":"USD","in_stock":false},{"title":"Bubbly \/ 5mm Round (~0.6 ct)","offer_id":50871286825248,"sku":"Gem_SphTiBub_Rnd_5","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Bubbly \/ 6mm Round (~1 ct)","offer_id":50871294689568,"sku":"Gem_SphTiBub_Rnd_6","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Bubbly \/ 7mm Round (~1.6ct)","offer_id":46716205891872,"sku":"Gem_SphTiBub_Rnd_7","price":45.0,"currency_code":"USD","in_stock":false},{"title":"Bubbly \/ 9mm Round (~3.5 ct)","offer_id":50871305404704,"sku":"Gem_SphTiBub_Rnd_9","price":98.0,"currency_code":"USD","in_stock":false},{"title":"Bubbly \/ 10mm Round (~4.6 ct)","offer_id":50871323558176,"sku":"Gem_SphTiBub_Rnd_10","price":135.0,"currency_code":"USD","in_stock":false},{"title":"Clean \/ 4mm Round (~0.3 ct)","offer_id":50871283482912,"sku":"Gem_SphTiCln_Rnd_4","price":14.0,"currency_code":"USD","in_stock":true},{"title":"Clean \/ 5mm Round (~0.6 ct)","offer_id":50871286858016,"sku":"Gem_SphTiCln_Rnd_5","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Clean \/ 6mm Round (~1 ct)","offer_id":50871294722336,"sku":"Gem_SphTiCln_Rnd_6","price":30.0,"currency_code":"USD","in_stock":false},{"title":"Clean \/ 7mm Round (~1.6ct)","offer_id":50871283155232,"sku":"Gem_SphTiCln_Rnd_7","price":45.0,"currency_code":"USD","in_stock":false},{"title":"Clean \/ 9mm Round (~3.5 ct)","offer_id":50871305437472,"sku":"Gem_SphTiCln_Rnd_9","price":98.0,"currency_code":"USD","in_stock":false},{"title":"Clean \/ 10mm Round (~4.6 ct)","offer_id":50871323590944,"sku":"Gem_SphTiCln_Rnd_10","price":135.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/titaniumsapphire.jpg?v=1701388152"},{"product_id":"golden-laser-garnet-faceted-stones-nd-ce-yag","title":"Golden Laser Garnet Faceted Stones, Ce+Nd YAG","description":"\u003cp\u003eThese are faceted golden laser garnets (Ce+Nd Yttrium Aluminum Garnet).  Some fluoresce pink and others fluoresce green-yellow, all have a rich golden-yellow base color that shifts depending on the illumination.\u003c\/p\u003e\n\u003cp\u003eWe have a special on 10mm stones with light chipping--they were shipped without appropriate padding, and our grief is your discount.\u003cbr\u003e\u003cbr\u003eThis is an unusual lab created garnet, YAG doped with both cerium and neodymium. 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In sunlight it has a strong golden hue while some indoor lights will make it more pure yellow or more orangeish, and on a black background it sometimes takes on a green cast.\u003cbr\u003e\u003cbr\u003eThese CeNd YAG stones also show unusual dual fluorescence, with a mix of bright yellow and pink under shortwave UV and yellow-green under both blue light and shortwave UV.\u003cbr\u003e\u003cbr\u003eYAG has a high hardness of 8.25-8.5 and no durability issues. 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Note that LYSO reacts much more strongly to 365 nm UV, and 395nm will be much less effective.\u003c\/p\u003e\n\u003cp\u003eSome of these are bubbly - we have labeled the ones that had very noticeable bubbles but it's possible a few will slip through in the others.  The especially bubbly LYSOs tend to be tenebrescent - they gain a yellow hue when exposed to UV and slowly fade back to white over time.\u003cbr\u003e\u003cbr\u003eLYSO is a very unusual crystal grown for use in science and industry.  It has a clear base and very strong blue fluorescence. It glows incredibly bright under UV light as well as higher energy radiation, and because of this it can be used to detect invisible gamma rays, xrays and even alpha rays. This type of LYSO has been optimized for ultra strong fluorescence with no afterglow (it does not glow in the dark, only with UV exposure). Its fluorescence is so strong it has a striking blue glow in sunlight--this effectively gives it a color change effect, since it looks colorless under room lighting and light purple-blue outdoors. It has a very interesting and unique look which you can't find anywhere else.\u003cbr\u003e\u003cbr\u003eAsianometry on youtube recently made a cool video about this material which you can watch here https:\/\/www.youtube.com\/watch?v=XpYYGiUX0x0\u003cbr\u003e\u003cbr\u003eLYSO is not very hard at around 5.8, just under tanzanite, and as such is not a good choice for a ring, though it would be great in a pendant or earrings.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"No Afterglow \/ 2mm Round (avg. 0.08ct)","offer_id":47216646717728,"sku":"Gem_LYSO_Rnd_2","price":5.0,"currency_code":"USD","in_stock":true},{"title":"No Afterglow \/ 2.5mm Round (avg. 0.14ct)","offer_id":51543727407392,"sku":"Gem_LYSO_Rnd_2.5","price":5.0,"currency_code":"USD","in_stock":true},{"title":"No Afterglow \/ 3mm Round (avg 0.2ct)","offer_id":47105002406176,"sku":"Gem_LYSO_Rnd_3","price":10.0,"currency_code":"USD","in_stock":true},{"title":"No Afterglow \/ Bubbly Round, 3mm, avg 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pink and ruins UV transmission), developed bubbles, shattered during growth or usually all three.  They recently closed their factory in Chicago and auctioned off the contents, and we were able to buy the entire pile of defective crystals!  It was a dream come true\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"2mm Round Cut avg. 0.03ct","offer_id":51131395178784,"sku":"Gem_F35_Round_2","price":10.0,"currency_code":"USD","in_stock":true},{"title":"2.5mm Round Cut avg. 0.07ct","offer_id":51131411628320,"sku":"Gem_F35_Round_2.5","price":11.0,"currency_code":"USD","in_stock":true},{"title":"3mm Round Cut avg. 0.14ct","offer_id":51131416641824,"sku":"Gem_F35_Round_3","price":13.0,"currency_code":"USD","in_stock":true},{"title":"3.5mm Round Cut avg. 0.2ct","offer_id":51131441545504,"sku":"Gem_F35_Round_3.5","price":14.0,"currency_code":"USD","in_stock":true},{"title":"4mm Round Cut avg. 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6.4ct","offer_id":47153314103584,"sku":"Gem_F35_Sqr_10","price":224.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Calibrated_f35_gems_under_normal_light.jpg?v=1781074694"},{"product_id":"copy-of-er-nd-soviet-laser-garnet-faceted-yag-loose-gemstones","title":"Er-Nd Soviet Laser Garnet, Faceted YAG Loose Gemstones","description":"\u003cp\u003e\u003cspan\u003eThese are faceted Er+Nd:YAG (Yttrium Aluminum Garnet) from an old Soviet collection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is a new material for us from an old collection, a 40-year-old failed experimental laser garnet from the Soviet Union. It is clearly doped with Erbium, and like our modern pure Er:YAG it has a striking combination of orange and pink colors and a remarkable color change. Unlike pure Er:YAG it has a stronger pink component, suggesting the addition of another dopant like Nd, and the color is also somewhat lighter as well. Most of the material was grown via HDSM aka the 'boat method', which was favored in the Soviet Union for most non-quartz growth, though a few pieces were clearly Czochralski pulled. From doing further reading we learned that the inventor of the HDSM method, Bagdasarov, was a soviet scientist and was working on erbium yag laser material in the 80s, so it all seems to check out.  Codoping Nd and Er can apparently produce a laser with a dual wavelength output which is incredibly useful so it all kind of checks out.  We even have a good guess as to why this material didn't make the cut for scientific use--aside from the variable base color some larger pieces show noticeable color zoning which means the codopants were not evenly mixed, which is not great if you want to make a laser.  While material intended for gem usage was also grown in these labs it would be odd to mix these two elements for that purpose and odder yet to then discard perfectly gem-quality material, so while we don't have perfect provenance the available information seems to match what the seller told us.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan\u003eOverall, it's a really cool material, and while I'm sure they were frustrated by the production problems their loss is our gain. This cuts amazing gems with a rich peachy-pink color-changing padparascha-like color. It also isn't one of those color changes that you might kind of see if you use a special flashlight or a lighter flame--the change is easily visible under real world lighting conditions and the stones look different throughout your daily routine.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan\u003eWith a hardness of 8.5 it is ideal for use in jewelry.\u003c\/span\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"2mm Round","offer_id":49519919235360,"sku":"Gem_ErNd_Round_2","price":6.0,"currency_code":"USD","in_stock":true},{"title":"3mm Round (avg. 0.15ct)","offer_id":49519919268128,"sku":"Gem_ErNd_Round_3","price":8.0,"currency_code":"USD","in_stock":true},{"title":"4mm Round (avg. 0.4ct)","offer_id":47274257187104,"sku":"Gem_ErNd_Round_4","price":14.0,"currency_code":"USD","in_stock":true},{"title":"5mm Round (avg. 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what this was grown for but it was likely a technical application like high end watch cases.  Fortunately the crystal had a few bubbles and I was able to get it instead and trim out clean pieces.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"3mm Round (avg. 0.15ct)","offer_id":50699671470368,"sku":"Cut_RubyDrk_Rnd_3","price":7.0,"currency_code":"USD","in_stock":false},{"title":"4mm Round (avg. 0.35ct)","offer_id":47274274980128,"sku":"Cut_RubyDrk_Rnd_4","price":12.0,"currency_code":"USD","in_stock":false},{"title":"5mm Round (avg. 0.65ct)","offer_id":47274275045664,"sku":"Cut_RubyDrk_Rnd_5","price":22.0,"currency_code":"USD","in_stock":false},{"title":"6.2mm Round (avg. 1.1ct)","offer_id":47274275078432,"sku":"Cut_RubyDrk_Rnd_6.3","price":38.0,"currency_code":"USD","in_stock":false},{"title":"11mm Round (avg.6.3ct)","offer_id":47274275111200,"sku":"Cut_RubyDrk_Rnd_11","price":220.0,"currency_code":"USD","in_stock":false},{"title":"4mm Hexagon (avg. 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The variation dropdown shows the carat weight and measurements of each stone.\u003c\/p\u003e\n\u003cp\u003eThis is an ultra-bright variant of LuAG grown by one of the world's leading photonics companies. While conventional material is merely ridiculously bright this material upgrades it to 'bonkers' levels with an even brighter glow.  The color is also just a bit yellower than the normal luag.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eLuAG is an exotic lab-created crystal with the same structure as natural garnets, but a composition and properties which are impossible in nature, particularly its outrageously strong green fluorescence which makes it glow when exposed to sunlight and even some indoor light. This is what we call a 'lumogarnet' - a lab created garnet with incredible fluorescence, designed to help detect invisible radiation. This is one of my favorite synthetic materials--brilliant and hard enough for use in all jewelry (mohs 8.5!).\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe fluorescence really is crazy--even normal room lights will make a LuAG gem fluoresce, and outdoors with indirect sunlight can make it look like it is photoshopped into real life. A blacklight aimed directly at it makes it insanely bright. It is just a great material overall, perfect for the collector and jeweler alike.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Princess Heart, 5.43ct","offer_id":51260511158560,"sku":"Gem_LuagXtra_002","price":325.0,"currency_code":"USD","in_stock":true},{"title":"Oval, 5.90ct","offer_id":51260511191328,"sku":"Gem_LuagXtra_007","price":354.0,"currency_code":"USD","in_stock":false},{"title":"Square, 5.97ct","offer_id":51260511224096,"sku":"Gem_LuagXtra_009","price":358.0,"currency_code":"USD","in_stock":true},{"title":"Square, 6ct","offer_id":51260511256864,"sku":"Gem_LuagXtra_011","price":360.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 6.10ct","offer_id":51260511289632,"sku":"Gem_LuagXtra_015","price":366.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 6.28ct","offer_id":51260511322400,"sku":"Gem_LuagXtra_017","price":376.0,"currency_code":"USD","in_stock":true},{"title":"Square, 6.30ct","offer_id":51260511355168,"sku":"Gem_LuagXtra_018","price":378.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6.35ct","offer_id":51260511387936,"sku":"Gem_LuagXtra_020","price":381.0,"currency_code":"USD","in_stock":true},{"title":"Octagon Long, 6.59ct","offer_id":51260511420704,"sku":"Gem_LuagXtra_021","price":395.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6.61ct","offer_id":51260511453472,"sku":"Gem_LuagXtra_022","price":396.0,"currency_code":"USD","in_stock":true},{"title":"Oval, 6.64ct","offer_id":51260511486240,"sku":"Gem_LuagXtra_024","price":398.0,"currency_code":"USD","in_stock":true},{"title":"Square, 6.68ct","offer_id":51260511519008,"sku":"Gem_LuagXtra_025","price":400.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 6.72ct","offer_id":51260511551776,"sku":"Gem_LuagXtra_026","price":403.0,"currency_code":"USD","in_stock":false},{"title":"Clipped Corner Rectangle, 7.06ct","offer_id":51260511584544,"sku":"Gem_LuagXtra_030","price":423.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 7.22ct","offer_id":51260511617312,"sku":"Gem_LuagXtra_031","price":433.0,"currency_code":"USD","in_stock":true},{"title":"Square, 7.54ct","offer_id":51260511650080,"sku":"Gem_LuagXtra_034","price":452.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 7.66ct","offer_id":51260511682848,"sku":"Gem_LuagXtra_035","price":459.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 7.75ct","offer_id":51260511715616,"sku":"Gem_LuagXtra_036","price":465.0,"currency_code":"USD","in_stock":true},{"title":"Round, 7.82ct","offer_id":51260511748384,"sku":"Gem_LuagXtra_038","price":469.0,"currency_code":"USD","in_stock":false},{"title":"Cushion, 7.94ct","offer_id":51260511781152,"sku":"Gem_LuagXtra_039","price":476.0,"currency_code":"USD","in_stock":false},{"title":"Cushion, 8.02ct","offer_id":51260511813920,"sku":"Gem_LuagXtra_040","price":481.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 8.28ct","offer_id":51260511846688,"sku":"Gem_LuagXtra_043","price":496.0,"currency_code":"USD","in_stock":false},{"title":"Round, 8.42ct","offer_id":51260511879456,"sku":"Gem_LuagXtra_044","price":505.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 8.67ct","offer_id":51260511912224,"sku":"Gem_LuagXtra_045","price":520.0,"currency_code":"USD","in_stock":true},{"title":"Round, 12.7mm, 17.5ct","offer_id":51260511944992,"sku":"Gem_LuAG_Extra_00120260221","price":1225.0,"currency_code":"USD","in_stock":true},{"title":"Round, 12.8mm, 17.7ct","offer_id":51260511977760,"sku":"Gem_LuAG_Extra_00220260221","price":1239.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 16.1x7.5mm, 13.6ct","offer_id":51260512010528,"sku":"Gem_LuAG_Extra_00320260221","price":952.0,"currency_code":"USD","in_stock":true},{"title":"Tablet Pixel, 13.3x10mm, 14.1ct","offer_id":51260512043296,"sku":"Gem_LuAG_Extra_00420260221","price":987.0,"currency_code":"USD","in_stock":true},{"title":"Tablet Pixel, 15.8x12.3mm, 15.8ct","offer_id":51260512076064,"sku":"Gem_LuAG_Extra_00520260221","price":1106.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/extrabrite.jpg?v=1731639365"},{"product_id":"gagg-lumogarnet-loose-faceted-stones-dayglow-fluorescence-slight-phosphorescence","title":"GAGG Lumogarnet Loose Faceted Stones, Dayglow Fluorescence (slight phosphorescence)","description":"\u003cp\u003eThese are faceted, lab-created day-glow GAGG (Gadolinium Aluminum Gallium Garnet).  They have been cut in a variety of shapes.\u003c\/p\u003e\n\u003cp\u003eCerium GAGG is a material which has recently risen to prominence in industry but never been used as a gem until now. This material is like an upgraded version of the classic GGG crossed with an aluminum garnet (like YAG and LuAG) to give it excellent hardness (8) while maintaining a high RI (1.9) and generally excellent gem properties. It is what we call a 'lumogarnet' - a synthetic garnet with incredible fluorescence. It glows a bright green-yellow, brighter than the already-ridiculously-bright Ce:YAG. Like Ce:YAG and LuAG it is used as a scintillator to help detect invisible radiation.\u003cbr\u003e\u003cbr\u003eThese stones have a very bright green-yellow fluorescence which gives them a super bright and almost uncanny glow in some lighting. A few of these stones also glow in the dark to some extent, though not as much as our high glow GAGG does. Still, it is a neat feature!\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Round, 2mm, ~0.05ct","offer_id":51381457551648,"sku":"Gem_GAGG_Round_2","price":10.0,"currency_code":"USD","in_stock":true},{"title":"Round, 3mm, ~0.2ct","offer_id":51381457617184,"sku":"Gem_GAGG_Round_3","price":14.0,"currency_code":"USD","in_stock":true},{"title":"Round, 3.5mm, ~0.35ct","offer_id":51381457649952,"sku":"Gem_GAGG_Round_3.5","price":16.0,"currency_code":"USD","in_stock":false},{"title":"Round, 4mm, ~0.5ct","offer_id":51381457682720,"sku":"Gem_GAGG_Round_4","price":17.0,"currency_code":"USD","in_stock":true},{"title":"Round, 5mm, ~0.9ct","offer_id":51381457715488,"sku":"Gem_GAGG_Round_5","price":31.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6mm, ~1.6ct","offer_id":51381457748256,"sku":"Gem_GAGG_Round_6","price":55.0,"currency_code":"USD","in_stock":true},{"title":"Round, 7mm, 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It has a totally unique color, with a rich almost tsavorite green base and strong red fluorescence. This means that it shows a mixture of red and green flashes, and which color predominates depends on the lighting (color and angle) as well as the background it is set against. Lighter toned stones will look almost pure green when placed on a white background but change to a mix of red and green when put on a dark background. Note that the camera exaggerates the red at the expense of the green--they do look better in person. They look a bit like alexandrite(which also gets its color from Cr3+ atoms) or color change garnet but is also totally different and unique. This is easily one of my favorite gems, unlike anything else found in nature or any other synthetic.\u003cbr\u003e\u003cbr\u003eCr:YAG is used in lasers as a 'Q-switch', which means it is opaque until it absorbs a critical amount of radiation and then suddenly becomes transparent. This allows a laser to charge its crystal up to a higher energy level before suddenly releasing it all in a single powerful\u003cspan\u003e \u003c\/span\u003eburst instead of shooting out in a continuous beam. Pulsed lasers can be extremely powerful and are incredibly useful for all sorts of applications, from tattoo removal to cutting edge physics research. Basically, like all bad sci-fi and good RPGs you can upgrade your laser just by slapping a crystal on the end.\u003cbr\u003e\u003cbr\u003eAs with all YAG, this material is ideal for jewelry with a high hardness of 8.5, no durability issues and good optical properties which make it sparkle brilliantly.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Skull, 9x8mm, 5.57ct","offer_id":51409520132384,"sku":"Gem_XmasSkull_00120260402","price":164.0,"currency_code":"USD","in_stock":false},{"title":"Skull, 11x10mm, 9.63ct","offer_id":51409520165152,"sku":"Gem_XmasSkull_00220260402","price":244.0,"currency_code":"USD","in_stock":false},{"title":"Skull, 11x10mm, 9.79ct","offer_id":51409520197920,"sku":"Gem_XmasSkull_00320260402","price":247.0,"currency_code":"USD","in_stock":false},{"title":"Skull, 11x10mm, 10.04ct","offer_id":51409520230688,"sku":"Gem_XmasSkull_00420260402","price":251.0,"currency_code":"USD","in_stock":true},{"title":"Skull, 11x10mm, 10.11ct","offer_id":51409520263456,"sku":"Gem_XmasSkull_00520260402","price":253.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/previewcopy.jpg?v=1728580637"},{"product_id":"lab-wakefieldite-loose-gems-aka-yttrium-orthovanadate-nd-yvo4-copy","title":"Lab Wakefieldite Calibrated Loose Gems aka Yttrium Orthovanadate Nd:YVo4","description":"\u003cp\u003eThese are faceted lab-grown wakefieldite in semi-calibrated cuts.  Note that the colors are not completely consistent--there is a wide range of colors between these that can blur together.  On top of that, the color change is significant enough between different LEDs that it's hard to categorize consistently.  This material is very rare as a gem!\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.turtleshoard.com\/products\/lab-wakefieldite-loose-gems-aka-yttrium-orthovanadate-nd-yvo4\" title=\"Fancy Cut Wakefieldite Gemstones\"\u003eFor larger individual fancy cut gems click here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eYVO4 is best known for its role in some very specialized lasers.  Like the more usual Nd:YAG it is a powerful lasing medium, but it has puts off a different wavelength and has other properties that make it preferable in some contexts.  Nanoparticles of medical-grade YVO4 have also shown promise as a treatment for wounds, promoting healing and reducing scar formation, and potentially even for general longevity, though the research is still in very early stages.\u003c\/p\u003e\n\u003cp\u003eAs a gem it is a challenging cut, difficult to polish with a relatively low hardness of 5 (same as apatite and some glasses) and two directions of perfect cleavage.  However the reward for cutting it are exceptional optical properties (refractive index 2.1, dispersion of \u003cspan\u003e0.084 ie 2x diamond) and enchanting colors with a strong color change.\u003c\/span\u003e\u003c\/p\u003e","brand":"Turtle's 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Cut stones are exceptionally beautiful with high brilliance and play of color like liquid rainbows flowing within them.  Its only real downside is its hardness of 5 and brittleness which make it a firm collector's stone.  Note it also has a high density of 7.1!\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"2mm Round","offer_id":50088983429408,"sku":"Gem_BGO12_Rnd_2","price":6.0,"currency_code":"USD","in_stock":false},{"title":"3mm Round Average 0.25ct","offer_id":50088983462176,"sku":"Gem_BGO12_Rnd_3","price":10.0,"currency_code":"USD","in_stock":false},{"title":"4mm Round Average 0.55ct","offer_id":50088983494944,"sku":"Gem_BGO12_Rnd_4","price":22.0,"currency_code":"USD","in_stock":false},{"title":"5mm Round average 1 ct","offer_id":50088880505120,"sku":"Gem_BGO12_Rnd_5","price":40.0,"currency_code":"USD","in_stock":true},{"title":"6mm Round Average 1.7ct","offer_id":50088880537888,"sku":"Gem_BGO12_Rnd_6","price":68.0,"currency_code":"USD","in_stock":true},{"title":"7mm Round Average 3.1ct","offer_id":50088880570656,"sku":"Gem_BGO12_Rnd_7","price":124.0,"currency_code":"USD","in_stock":true},{"title":"8mm Round Average 4.1ct","offer_id":50088983527712,"sku":"Gem_BGO12_Rnd_8","price":164.0,"currency_code":"USD","in_stock":true},{"title":"9mm Round Average 5ct","offer_id":50089001320736,"sku":"Gem_BGO12_Rnd_9","price":200.0,"currency_code":"USD","in_stock":true},{"title":"10mm Round Average 8ct","offer_id":50088983560480,"sku":"Gem_BGO12_Rnd_10","price":320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/bgo12thumb.jpg?v=1744648248"},{"product_id":"bismuth-germanate-bgo20-faceted-stones-rare-lab-sillenite-rounds","title":"Bismuth Germanate BGO20 Faceted Stones, Rare Lab Sillenite","description":"\u003cp\u003eThese are faceted, lab-grown BGO20 (Bismuth Germanate), a rare crystal grown for opto-electrical purposes with incredible sparkle and fire.\u003cbr\u003e\u003cbr\u003eThis is a real cool rarity in the gem world: bismuth germanate (in this case, specifically \u003cspan\u003eBi\u003c\/span\u003e\u003csub\u003e12\u003c\/sub\u003e\u003cspan\u003eGeO\u003c\/span\u003e\u003csub\u003e20\u003c\/sub\u003e aka sillenite).  BGO20 has bizarre opto-electrical properties which make it incredibly useful in niche applications, such as as an acousto-optical modulator.  It also has the highest density of any gem you can get, with a specific gravity of 9.22 (ie 80% as dense as lead!)\u003c\/p\u003e\n\u003cp\u003eIt also has incredible optical properties, with an exceptionally high RI of \u003cspan\u003e2.57\u003c\/span\u003e and extreme dispersion of \u003cspan\u003e0.221 (diamond is 0.04!)\u003c\/span\u003e, which make it an amazing gem when faceted. Cut stones are exceptionally beautiful with a weirdly vivid, venomous color, high brilliance and play of color.  Its only real downside is its hardness of 4.5 and brittleness which make it a definite collector's stone for display instead of for jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"6mm Round Average 2.4ct","offer_id":50333486940448,"sku":"Gem_BGO20_6","price":80.0,"currency_code":"USD","in_stock":true},{"title":"7mm Round Average 3.9ct","offer_id":50333486973216,"sku":"Gem_BGO20_7","price":120.0,"currency_code":"USD","in_stock":true},{"title":"8mm Round Average 5.8ct","offer_id":50333487005984,"sku":"Gem_BGO20_8","price":179.0,"currency_code":"USD","in_stock":true},{"title":"9mm Round Average 8.2ct","offer_id":51477898494240,"sku":"Gem_BGO20_9","price":251.0,"currency_code":"USD","in_stock":true},{"title":"10mm Round Average 12ct","offer_id":51477898527008,"sku":"Gem_BGO20_10","price":365.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/BGO_20_Gemstone_Faceted.jpg?v=1776059679"},{"product_id":"ghost-garnet-aka-pr-luag-lumogarnet-faceted-loose-gems-orange-glow","title":"Ghost Garnet aka Pr:LuAG Lumogarnet Faceted Loose Gems Orange Glow","description":"\u003cp\u003eThese are faceted 'Ghost Garnet', aka lab made Pr-doped LuAG (Lutetium Aluminum Garnet). We have calibrated rounds both in high dopant and lower dopant levels--both are gorgeous.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eLuAG is an exotic lab-created crystal with the same structure as natural garnets, but a composition and properties which are impossible in nature.  While the most famous type is the neon green cerium-doped LuAG, when doped with praseodymium instead you get this very odd multifluorescence: longwave UV gives a pale green, shortwave gives violet and best of all blue light gives a strong orange glow.  This means that against a black background in blue-leaning lighting you have a light green stone with a visible orange glow--very uncanny!\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003ePr:LuAG, like its more famous brother Ce:LuAG, is used as a scintillator in high end applications.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"4mm Round (avg. 0.5ct) Light Dopant","offer_id":50398074241312,"sku":"Gem_Ghost_Round_4l","price":22.0,"currency_code":"USD","in_stock":false},{"title":"5mm Round (avg. 1.1ct) Light Dopant","offer_id":50398074306848,"sku":"Gem_Ghost_Round_5l","price":44.0,"currency_code":"USD","in_stock":false},{"title":"6mm Round (avg. 1.8ct) Light Dopant","offer_id":50398074372384,"sku":"Gem_Ghost_Round_6l","price":72.0,"currency_code":"USD","in_stock":false},{"title":"7mm Round (avg. 2.9ct) Light Dopant","offer_id":50398074437920,"sku":"Gem_Ghost_Round_7l","price":116.0,"currency_code":"USD","in_stock":false},{"title":"8mm Round (avg. 4ct) Light Dopant","offer_id":50398074503456,"sku":"Gem_Ghost_Round_8l","price":160.0,"currency_code":"USD","in_stock":true},{"title":"9mm Round (avg. 5.8ct) Light Dopant","offer_id":50398074568992,"sku":"Gem_Ghost_Round_9l","price":232.0,"currency_code":"USD","in_stock":true},{"title":"10mm Round (avg. 8.3ct) Light Dopant","offer_id":50398074634528,"sku":"Gem_Ghost_Round_10l","price":310.0,"currency_code":"USD","in_stock":true},{"title":"6mm Round (avg. 1.8ct) Heavy Dopant","offer_id":50398093443360,"sku":"Gem_Ghost_Round_6H","price":72.0,"currency_code":"USD","in_stock":false},{"title":"9mm Round (avg. 5.8ct) Heavy Dopant","offer_id":50398086070560,"sku":"Gem_Ghost_Round_9H","price":232.0,"currency_code":"USD","in_stock":false},{"title":"10mm Round (avg. 8.3ct) Heavy Dopant","offer_id":50398086103328,"sku":"Gem_Ghost_Round_10H","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/IMG_00012_4fcc01b0-4d7b-49c5-81ca-3075e8403e07.jpg?v=1751826855"},{"product_id":"lso-faceted-loose-gems-blue-fluorescent-glow-in-the-dark-scintillator","title":"LSO Faceted Loose Gems Blue Fluorescent Glow in the Dark Scintillator","description":"\u003cp\u003eThese are loose calibrated faceted stones of LSO (Lutetium Oxyorthosilicate), close cousin to LYSO (Lutetium Yttrium Oxyorthosilicate).  All show bright blue fluorescence strong enough to give them a full color change to light blue in direct sunlight.  They also have a mild afterglow, showing a blue glow after exposure to UV which can be seen in cupped hands.  Note that LSO reacts much more strongly to 365 nm UV, and 395nm will be much less effective.\u003cbr\u003e\u003cbr\u003eLSO is a very unusual crystal grown for use in science and industry.  It has a clear base and very strong blue fluorescence. It glows incredibly bright under UV light as well as higher energy radiation, and because of this it can be used to detect invisible gamma rays, xrays and even alpha rays.  Given how expensive lutetium is LSO has been largely supplanted by LYSO, where less expensive yttrium substitutes in.  The main differences are that LSO is more dense and tends to be more phosphorescent. Its fluorescence is so strong it has a striking blue glow in sunlight--this effectively gives it a color change effect, since it looks colorless under room lighting and light purple-blue outdoors. It has a very interesting and unique look which you can't find anywhere else.\u003cbr\u003e\u003cbr\u003eAsianometry on youtube recently made a cool video about this material which you can watch here https:\/\/www.youtube.com\/watch?v=XpYYGiUX0x0\u003cbr\u003e\u003cbr\u003eLSO is not very hard at around 5.8, just under tanzanite, and as such is not a good choice for a ring, though it would be great in a pendant or earrings.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Afterglow \/ 2mm Round (avg. 0.08ct)","offer_id":50704399368480,"sku":"Gem_LSO_Rnd_2","price":7.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 3mm Round (avg 0.2ct)","offer_id":50704399401248,"sku":"Gem_LSO_Rnd_3","price":12.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 4mm Round (avg. 0.6ct)","offer_id":50704399466784,"sku":"Gem_LSO_Rnd_4","price":21.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 5mm Round (avg. 1.2ct)","offer_id":50704399532320,"sku":"Gem_LSO_Rnd_5","price":42.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 6mm Round (avg. 1.9ct)","offer_id":50704441475360,"sku":"Gem_LSO_Rnd_6","price":66.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 7mm Round (avg. 3ct)","offer_id":50704441508128,"sku":"Gem_LSO_Rnd_7","price":105.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 8mm Round (avg. 4.4ct)","offer_id":50704441540896,"sku":"Gem_LSO_Rnd_8","price":154.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 9mm Round (avg. 6.2ct)","offer_id":50704441573664,"sku":"Gem_LSO_Rnd_9","price":217.0,"currency_code":"USD","in_stock":false},{"title":"Afterglow \/ 10mm Round (avg. 8.2ct)","offer_id":50704441606432,"sku":"Gem_LSO_Rnd_10","price":287.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/20250915_174150.jpg?v=1757977135"},{"product_id":"special-cerium-yag-lumogarnet-loose-faceted-stones-orange-fluorescence","title":"Special Cerium YAG Lumogarnet Loose Faceted Stones, Orange Fluorescence","description":"\u003cp\u003eThese are our special, custom grown cerium YAG with orange fluorescence.\u003c\/p\u003e\n\u003cp\u003eThis material was custom grown for us in an attempt to make an ultra-bright cerium yag formulation.  Our first one succeeded, but subsequent ones have had an odd result, instead showing normal (exceptional) brightness but an orange fluorescence rather than greenish-yellow.  These stones are still very beautiful though, and their unusual orange fluorescence gives them a unique look.  Note the orange shows best under 365nm UV--395 will generally just show yellow.\u003c\/p\u003e\n\u003cp\u003eCerium YAG is known for its exceptionally strong yellow fluorescence paired with its canary yellow base color.  It was actually first used as a gem before its scientific potential was recognized, leading to the development of technical-grade formulations with even brighter fluorescence.  Today it is widely used as a phosphor in LEDs, absorbing some blue light and emitting yellow which can turn a blue LED into a white one.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"4mm Round Cut (avg 0.4ct)","offer_id":50804346061088,"sku":"Gem_YAG_Spcl_Rnd_4","price":14.0,"currency_code":"USD","in_stock":false},{"title":"5mm Round Cut (avg 0.7ct)","offer_id":50804346093856,"sku":"Gem_YAG_Spcl_Rnd_5","price":24.0,"currency_code":"USD","in_stock":false},{"title":"6mm Round Cut (avg 1.1ct)","offer_id":50804346126624,"sku":"Gem_YAG_Spcl_Rnd_6","price":38.0,"currency_code":"USD","in_stock":false},{"title":"7mm Round Cut (avg 1.8ct)","offer_id":50804356743456,"sku":"Gem_YAG_Spcl_Rnd_7","price":63.0,"currency_code":"USD","in_stock":false},{"title":"8mm Round Cut (avg 2.8ct)","offer_id":50804356776224,"sku":"Gem_YAG_Spcl_Rnd_8","price":80.0,"currency_code":"USD","in_stock":false},{"title":"9mm Round Cut (avg 4ct)","offer_id":50804356808992,"sku":"Gem_YAG_Spcl_Rnd_9","price":110.0,"currency_code":"USD","in_stock":true},{"title":"10mm Round Cut (avg 5.1ct)","offer_id":50804356841760,"sku":"Gem_YAG_Spcl_Rnd_10","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/front_f46bfaba-a6fc-4994-8b4d-dd7a5ad8e3d6.jpg?v=1760580572"},{"product_id":"custom-jack-o-lantern-gems-in-high-glow-gagg-and-samarium-yag","title":"Custom Jack O Lantern Gems in High Glow GAGG and Samarium YAG","description":"\u003cp\u003eThese are the first two gems cut in my new 'GemmoLantern' Design!  The yellow GAGG weighs in at 57.5ct and the light golden samarium YAG weighs in at 34.2ct.\u003c\/p\u003e\n\u003cp\u003eThe first one is a \"high glow\" glow-in-the-dark GAGG garnet.  This is our highest grade of GAGG, and it GLOWS IN THE DARK! That's right, I'm so excited about it I wrote it in all caps! They work very hard to make sure it does not glow in the dark since it lowers the temporal resolution of the system (you want to know where an x-ray is now, not where it was an hour ago!) but sometimes they make mistakes, and a small subset have a stronger glow. On top of all that it has a greener color than any of our other GAGGs.\u003c\/p\u003e\n\u003cp\u003eThe second stone is cut is samarium-doped YAG with a strong orange glow under UV light.  Samarium YAG is used as a non-contact pressure gauge in diamond anvil experiments--the color of its fluorescence changes with pressure, so it can very accurately report pressure without any physical connection to the outside.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Glow in the Dark GAGG 57.5ct","offer_id":50816664305952,"sku":null,"price":500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/jackfront.jpg?v=1760928262"},{"product_id":"calibrated-fantasy-cut-laser-garnets","title":"Calibrated Fantasy Cut Laser Garnets","description":"\u003cp\u003eThese are calibrated fantasy cut laser garnets (Nd+Ce:YAG) with concave facets.  They come in violet and gold (depending on the ratio of Ce to Nd) and have variable fluorescence including yellow, pink, red and violet.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe laser garnets were grown varying chemistries, creating different colors ranging from pink to orange to gold to green,  And the fluorescence has multiple colors too, with some stones showing both pink AND yellow at the same time.  Some of these have bubbles, a natural consequence of the growth method that produces them and one of the reasons they didn't make it into lasers.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWith a hardness 8.5, YAG laser garnets are ideal for use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Gold \/ 8.2mm Round 3.3ct","offer_id":50834422006048,"sku":"Fant_YAGCeNd_Rnd_8.2","price":75.0,"currency_code":"USD","in_stock":false},{"title":"Gold \/ 9mm Round 4.5ct","offer_id":50834422038816,"sku":"Fant_YAGCeNd_Rnd_9","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ 9.3mm Round avg 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9.5ct","offer_id":50834422268192,"sku":"Fant_YAGCeNd_Rnd_12","price":190.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Round 12.7mm 13.3ct","offer_id":50834422300960,"sku":"Fant_YAGCeNd_Rnd_12.7","price":231.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 8.2mm Round 3.3ct","offer_id":50834421711136,"sku":"Fant_YAGNdCe_Rnd_8.2","price":75.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 9mm Round 4.5ct","offer_id":50834421743904,"sku":"Fant_YAGNdCe_Rnd_9","price":90.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 9.3mm Round avg 4.6ct","offer_id":50834421776672,"sku":"Fant_YAGNdCe_Rnd_9.3","price":95.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 9.7mm Round avg 5.3ct","offer_id":50834421809440,"sku":"Fant_YAGNdCe_Rnd_9.7","price":106.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 10mm Round avg 5.6ct","offer_id":50834421842208,"sku":"Fant_YAGNdCe_Rnd_10","price":112.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 10mm Bullseye Fluorescence 6.3ct","offer_id":50834421874976,"sku":"Fant_YAGNdCe_Bull_10","price":150.0,"currency_code":"USD","in_stock":false},{"title":"violet \/ 10.7mm Round avg 7.1ct","offer_id":50834421907744,"sku":"Fant_YAGNdCe_Rnd_10.7","price":142.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ 11mm Round avg. 7.3ct","offer_id":50834421940512,"sku":"Fant_YAGNdCe_Rnd_11","price":150.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ 12mm Round avg. 9.5ct","offer_id":50834421973280,"sku":"Fant_YAGNdCe_Rnd_12","price":190.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ Round 12.7mm 13.3ct","offer_id":50834101862688,"sku":"Fant_YAGNdCe_Rnd_12.7","price":231.0,"currency_code":"USD","in_stock":false},{"title":"Gold \/ 8mm Round 3.2ct","offer_id":51859575144736,"sku":"Fant_YAGCeNd_Rnd_8","price":71.0,"currency_code":"USD","in_stock":true},{"title":"violet \/ 8mm Round 3.2ct","offer_id":51859587629344,"sku":"Fant_YAGNdCe_Rnd_8","price":71.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/frontcopy.jpg?v=1761255760"},{"product_id":"pure-nd-yag-gems-violet-laser-garnet-loose-stones","title":"Pure Nd:YAG Calibrated Gems, Violet Laser Garnet Loose Stones","description":"\u003cp\u003eThese are violet Nd laser garnets (Nd:YAG) cut into various calibrated shapes: rounds, hexagons, and squares.  These are violet in normal light and turn pure colorless under fluorescent illumination (like a CFL bulb).  It also shifts from violet to magenta to blueberry purple depending on the color temperature of LED lighting, though this is less pronounced.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.gemsofscience.com\/products\/fantasy-cut-violet-laser-garnet-nd-yag\" target=\"_blank\" title=\"Fancy Pure Nd:YAG gemstones\" rel=\"noopener\"\u003eFor fancy designs and fantasy cut Nd:YAG stones, click here!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eNote that the smaller squares can sometimes be a bit more trapezoidal, they have been discounted accordingly.\u003c\/p\u003e\n\u003cp\u003eThis is pure Nd:YAG, not the material codoped with Cerium, so you won't see any fluorescence under longwave UV (though the pale green\/white under shortwave is still present).\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eNd YAG has been used in lasers since 1964. It is still the most classic and widely-used variety. With a hardness of 8.5 it is ideal for use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Square, 4mm, 0.5ct","offer_id":51272488190240,"sku":"Gem_YAGNdSq_4","price":19.0,"currency_code":"USD","in_stock":true},{"title":"Square, 5mm, 0.9ct","offer_id":51272488223008,"sku":"Gem_YAGNdSq_5","price":36.0,"currency_code":"USD","in_stock":true},{"title":"Square, 6mm, 1.6ct","offer_id":51272488255776,"sku":"Gem_YAGNdSq_6","price":63.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 4mm, 0.4ct","offer_id":51272488288544,"sku":"Gem_YAGNdHex_4","price":16.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 5mm, 0.8ct","offer_id":51272488321312,"sku":"Gem_YAGNdHex_5","price":32.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 6mm, 1.3ct","offer_id":51272488354080,"sku":"Gem_YAGNdHex_6","price":52.0,"currency_code":"USD","in_stock":true},{"title":"Round, 3mm, 0.14ct","offer_id":51272488386848,"sku":"Gem_YAGNdRnd_3","price":10.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4mm, 0.35ct","offer_id":51272488419616,"sku":"Gem_YAGNdRnd_4","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Round, 5mm, 0.65ct","offer_id":51272488452384,"sku":"Gem_YAGNdRnd_5","price":26.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6mm, 1.2ct","offer_id":51272488485152,"sku":"Gem_YAGNdRnd_6","price":48.0,"currency_code":"USD","in_stock":true},{"title":"Round, 7mm, 1.9ct","offer_id":51272488517920,"sku":"Gem_YAGNdRnd_7","price":75.0,"currency_code":"USD","in_stock":true},{"title":"Round, 8mm, 2.8ct","offer_id":51272488550688,"sku":"Gem_YAGNdRnd_8","price":109.0,"currency_code":"USD","in_stock":true},{"title":"Round, 9mm, 3.8ct","offer_id":51272488583456,"sku":"Gem_YAGNdRnd_9","price":146.0,"currency_code":"USD","in_stock":true},{"title":"Round, 10mm, 5.2ct","offer_id":51272488616224,"sku":"Gem_YAGNdRnd_10","price":196.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 4mm, 0.48ct","offer_id":51442640584992,"sku":"Gem_YAGNdCush_4","price":24.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 5mm, 0.95ct","offer_id":51442640617760,"sku":"Gem_YAGNdCush_5","price":43.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 6mm, 1.6ct","offer_id":51442640650528,"sku":"Gem_YAGNdCush_6","price":68.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 7mm, 2.5ct","offer_id":51442640683296,"sku":"Gem_YAGNdCush_7","price":102.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 8mm, 3.5ct","offer_id":51442640716064,"sku":"Gem_YAGNdCush_8","price":138.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 10mm, 6.7ct","offer_id":51442640748832,"sku":"Gem_YAGNdCush_10","price":253.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 5mm, 0.6ct","offer_id":51442640781600,"sku":"Gem_YAGNdTri_5","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 6mm, 1ct","offer_id":51442640814368,"sku":"Gem_YAGNdTri_6","price":45.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 7mm, 1.45ct","offer_id":51442640847136,"sku":"Gem_YAGNdTri_7","price":63.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 8mm, 2.2ct","offer_id":51442640879904,"sku":"Gem_YAGNdTri_8","price":91.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 10mm, 5.15ct","offer_id":51442640912672,"sku":"Gem_YAGNdTri_10","price":196.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Pure_Nd_YAG_Under_LED_Lights.jpg?v=1772184776"},{"product_id":"mint-garnet-loose-gems-low-dopant-cr3-yag","title":"Mint Garnet Loose Gems (Low Dopant Cr3+ YAG)","description":"\u003cp\u003e\u003cspan\u003eThese are faceted mint garnets.  These are chromium laser YAG or Cr3+YAG, but with a low concentration - you get less of the Christmas effect and more of a refreshing pale green gem.  There is still some red fluorescence, but less visible.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eLighter toned stones will look almost pure green when placed on a white background but show some red and green when put on a dark background. Note that the camera exaggerates the red at the expense of the green--they do look better in person. They look a bit like alexandrite or color change garnet but is also totally different and unique. This is easily one of my favorite gems, unlike anything else found in nature or any other synthetic.\u003cbr\u003e\u003cbr\u003eCr:YAG is used in lasers as a 'q switch', which means it is opaque until it absorbs a critical amount of radiation and then suddenly becomes transparent. This allows a laser to charge its crystal up to a higher energy level before suddenly releasing it all in a single powerful\u003cspan\u003e \u003c\/span\u003eburst instead of shooting out in a continuous beam. Pulsed lasers can be extremely powerful and are incredibly useful for all sorts of applications, from tattoo removal to cutting edge physics research. Basically, like all bad sci-fi and good RPGs you can upgrade your laser just by slapping a crystal on the end.\u003cbr\u003e\u003cbr\u003eLike all YAG this material is ideal for jewelry with a high hardness of 8.5, no durability issues and good optical properties which make it sparkle brilliantly.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Round, 2mm, 0.05ct","offer_id":51781523046688,"sku":"Gem_Mint_RND2","price":7.0,"currency_code":"USD","in_stock":true},{"title":"Round, 2.5mm, 0.1ct","offer_id":51781523079456,"sku":"Gem_Mint_RND2.5","price":9.0,"currency_code":"USD","in_stock":true},{"title":"Round, 3mm, 0.15ct","offer_id":51384567660832,"sku":"Gem_Mint_RND3","price":11.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4mm, 0.35ct","offer_id":51384567693600,"sku":"Gem_Mint_RND4","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4.5mm, 0.5ct","offer_id":51384567726368,"sku":"Gem_Mint_RND4.5","price":21.0,"currency_code":"USD","in_stock":false},{"title":"Round, 5mm, 0.75ct","offer_id":51384567759136,"sku":"Gem_Mint_RND5","price":26.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6mm, 1.1ct","offer_id":51781523112224,"sku":"Gem_Mint_RND6","price":47.0,"currency_code":"USD","in_stock":true},{"title":"Round, 7mm, 1.6ct","offer_id":51781523144992,"sku":"Gem_Mint_RND7","price":64.0,"currency_code":"USD","in_stock":true},{"title":"Round, 8mm, 2.9ct","offer_id":51384567791904,"sku":"Gem_Mint_RND8","price":104.0,"currency_code":"USD","in_stock":false},{"title":"Hex, 4mm, 0.45ct","offer_id":51384567824672,"sku":"Gem_Mint_HEX4","price":16.0,"currency_code":"USD","in_stock":false},{"title":"Hex, 4.5mm, 0.65ct","offer_id":51384567857440,"sku":"Gem_Mint_HEX4.5","price":23.0,"currency_code":"USD","in_stock":false},{"title":"Hex, 6mm, 1.4ct","offer_id":51384567890208,"sku":"Gem_Mint_HEX6","price":48.0,"currency_code":"USD","in_stock":false},{"title":"Hex, 7mm, 2.35ct","offer_id":51384567922976,"sku":"Gem_Mint_HEX7","price":78.0,"currency_code":"USD","in_stock":false},{"title":"Hex, 8mm, 3.4ct","offer_id":51384567955744,"sku":"Gem_Mint_HEX8","price":109.0,"currency_code":"USD","in_stock":true},{"title":"Hex, 10mm, 6.5ct","offer_id":51384567988512,"sku":"Gem_Mint_HEX10","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 4mm, 0.3ct","offer_id":51781522817312,"sku":"Gem_Mint_TRI4","price":16.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 5mm, 0.6ct","offer_id":51781522850080,"sku":"Gem_Mint_TRI5","price":28.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 6mm, 1ct","offer_id":51781522882848,"sku":"Gem_Mint_TRI6","price":43.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 10mm, 4.5ct","offer_id":51781523013920,"sku":"Gem_Mint_TRI10","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Mint_Garnet_Gemstones.jpg?v=1774579323"},{"product_id":"faceted-er-nd-soviet-laser-garnets","title":"Faceted Er-Nd Soviet Laser Garnets, Calibrated Color Change (Orange-Pink) YAG Gemstones","description":"\u003cp\u003eThese are faceted stones of an unusual experimental laser garnet from the Soviet union, codoped with Erbium and (likely) neodymium.  The base color ranges from orange-pink to purple-pink, and they color change from more orange to more pink depending on the light source.\u003cbr\u003e\u003cbr\u003eThis is a new material for us from an old collection, a 40-year-old failed experimental laser garnet from the Soviet Union. It is clearly doped with Erbium, and like our modern pure Er:YAG it has a striking combination of orange and pink colors and a remarkable color change. Unlike pure Er:YAG it has a stronger pink component, suggesting the addition of another dopant like Nd, and the color is also somewhat lighter as well. Most of the material was grown via HDSM aka the 'boat method', though a few pieces were clearly czochralski pulled. From doing further reading we learned that the inventor of the HDSM method was a soviet scientist and was working on erbium yag laser material in the 80s. Codoping Nd and Er can produce a laser with a dual wavelength output as well, so that was likely the reason to grow this material. \u003c\/p\u003e\n\u003cp\u003eWe even have a good guess as to why this material didn't make the cut--aside from the variable base color some larger pieces of the rough showed noticeable color zoning which means the codopants were not evenly mixed, which is not great if you want to make a laser.\u003cbr\u003e\u003cbr\u003eOverall, it's a really cool material, and while I'm sure the USSR scientists were frustrated by the production problems, their loss is our gain. The stones have a rich peachy-pink color-changing padparascha-like color. It also isn't one of those color changes that you might kind of see if you use a special flashlight or a lighter flame--the change is easily visible under real world lighting conditions and the stones look different throughout your daily routine.\u003cbr\u003e\u003cbr\u003eYAG in general is an ideal material for faceting, which a high hardness of 8.5, no cleavage, no problems with polishing and excellent optical properties with an RI of 1.82. It is considered one of the easiest materials to facet.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Square, 4mm, avg ~0.5ct","offer_id":51400939700512,"sku":"Gem_USSRYAG_SQ4","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Square, 5mm, avg ~0.9ct","offer_id":51400939733280,"sku":"Gem_USSRYAG_SQ5","price":36.0,"currency_code":"USD","in_stock":true},{"title":"Square, 6mm, avg ~1.6ct","offer_id":51400939766048,"sku":"Gem_USSRYAG_SQ6","price":63.0,"currency_code":"USD","in_stock":true},{"title":"Square, 7mm, avg ~2.6ct","offer_id":51400939798816,"sku":"Gem_USSRYAG_SQ7","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Square, 8mm, avg ~4ct","offer_id":51400939831584,"sku":"Gem_USSRYAG_SQ8","price":145.0,"currency_code":"USD","in_stock":true},{"title":"Square, 9mm, avg ~5.8ct","offer_id":51400939864352,"sku":"Gem_USSRYAG_SQ9","price":203.0,"currency_code":"USD","in_stock":true},{"title":"Square, 10mm, avg ~8.1ct","offer_id":51400939897120,"sku":"Gem_USSRYAG_SQ10","price":284.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4mm, avg ~0.3ct","offer_id":51400939929888,"sku":"Gem_USSRYAG_RND4","price":12.0,"currency_code":"USD","in_stock":true},{"title":"Round, 5mm, avg ~0.65ct","offer_id":51400939962656,"sku":"Gem_USSRYAG_RND5","price":26.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6mm, avg ~1.15ct","offer_id":51400939995424,"sku":"Gem_USSRYAG_RND6","price":46.0,"currency_code":"USD","in_stock":true},{"title":"Hex, 6mm, avg ~1.35ct","offer_id":51408709943584,"sku":"Gem_USSRYAG_HEX6","price":56.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Soviet_Er_Nd_YAG_Gemstone.jpg?v=1774996350"},{"product_id":"lithium-tantalate-faceted-stones-sparkly-litao3-gems","title":"Lithium Tantalate Faceted Stones, Sparkly Tantalia Loose Gems","description":"\u003cp\u003eThese are lab created white lithium tantalate gems. \u003cbr\u003e\u003cbr\u003eLithium tantalate (LiTaO3) is an old rarity of the gem world and rarely seen today outside of industry. It was briefly used as a diamond simulant and marketed as 'tantalia', but was never very successful- tantalate is much brighter and more dispersive than a diamond,so there was an obvious difference when cut. Faceted lithium tantalate gems give off brilliant rainbows of color, so it's an amazing gem in its own right instead of just trying to imitate diamonds.\u003c\/p\u003e\n\u003cp\u003eNote that LiTAO3's hardness is just under 6, which makes it harder than some other classic diamond simulants (like lithium niobate and strontium titanate) but still soft for a gem, a little softer than tanzanite. It is not a good stone for rings but will work well in lower-wear jewelry like pendants or earrings.\u003c\/p\u003e\n\u003cp\u003eToday lithium tantalate is only grown for scientific and industrial usage--its very unusual optical and electrical properties like piezoelectricity and pyroelectricity make it an incredible material for things like fiber optic networks. There has even been a fusion reactor designed around it!\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Round, 3mm, 0.25ct","offer_id":51761094230304,"sku":"Gem_Tantalia_Rnd3","price":15.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4mm, 0.6ct","offer_id":51761094263072,"sku":"Gem_Tantalia_Rnd4","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Round, 5mm, 1.2ct","offer_id":51761094295840,"sku":"Gem_Tantalia_Rnd5","price":53.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6mm, 2.1ct","offer_id":51761094328608,"sku":"Gem_Tantalia_Rnd6","price":86.0,"currency_code":"USD","in_stock":true},{"title":"Round, 7mm, 3.3ct","offer_id":51761094361376,"sku":"Gem_Tantalia_Rnd7","price":128.0,"currency_code":"USD","in_stock":true},{"title":"Round, 8mm, 4.6ct","offer_id":51761094394144,"sku":"Gem_Tantalia_Rnd8","price":168.0,"currency_code":"USD","in_stock":true},{"title":"Round, 9mm, 6.7ct","offer_id":51761094426912,"sku":"Gem_Tantalia_Rnd9","price":240.0,"currency_code":"USD","in_stock":true},{"title":"Round, 10mm, 9.5ct","offer_id":51761094459680,"sku":"Gem_Tantalia_Rnd10","price":338.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 5mm, 1.2ct","offer_id":51761094492448,"sku":"Gem_Tantalia_Hex5","price":53.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 6mm, 2.1ct","offer_id":51761094525216,"sku":"Gem_Tantalia_Hex6","price":86.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 7mm, 3.4ct","offer_id":51761094557984,"sku":"Gem_Tantalia_Hex7","price":131.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 8mm, 5.5ct","offer_id":51761094590752,"sku":"Gem_Tantalia_Hex8","price":198.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 9mm, 7.6ct","offer_id":51761094623520,"sku":"Gem_Tantalia_Hex9","price":271.0,"currency_code":"USD","in_stock":true},{"title":"Hexagon, 10mm, 10.4ct","offer_id":51761094656288,"sku":"Gem_Tantalia_Hex10","price":369.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 6mm, 1.9ct","offer_id":51761094689056,"sku":"Gem_Tantalia_Tri6","price":79.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 7mm, 3.1ct","offer_id":51761094721824,"sku":"Gem_Tantalia_Tri7","price":121.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 8mm, 4.1ct","offer_id":51761094754592,"sku":"Gem_Tantalia_Tri8","price":153.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 9mm, 6ct","offer_id":51761094787360,"sku":"Gem_Tantalia_Tri9","price":215.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 10mm, 8.5ct","offer_id":51761094820128,"sku":"Gem_Tantalia_Tri10","price":303.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Clear_Tantalia_Faceted_Gemstones.jpg?v=1780199246"},{"product_id":"cut-nd-ce-yag-gems-nd-laser-yag-calibrated-gemstones","title":"Cut Nd\/Ce YAG Gems, Nd+ Laser YAG Calibrated Gemstones","description":"\u003cp\u003eThese are color change Nd+ laser garnets (Nd:Ce:YAG), which are light violet, pink or peach in normal lighting and turn a pale yellow under fluorescent illumination. Each individual stone is labelled with its carat weight and letter in the photo and they can be purchased individually.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThis is next-gen Nd+ laser YAG, a type of lab created garnet used widely in lasers.  The original Nd YAG has been used in lasers since 1964, but the old formula only contained Nd and was all the same shade of purple-pink.  This material is a newer, more advanced formulation with extra elements like Ce added to broaden the accepted wavelengths for lasing thus making the lasers more powerful, and these add another dimension to the color.  In natural light they vary from purple to pink to peach, and under fluorescent lighting they change to near colorless or a pale orange-yellow (NdCe YAG will show more yellow under CFL with higher Ce concentrations).  These stones have been compared to Mahenge garnets and pastel pyropes.\u003c\/p\u003e\n\u003cp\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith a hardness of 8.5 it is ideal for use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Round, 2mm, avg. 0.05ct","offer_id":51857658544416,"sku":"Gem_YAGNdCe_Rnd2","price":7.0,"currency_code":"USD","in_stock":true},{"title":"Round (Pink Glow), 2mm, avg. 0.05ct","offer_id":51857658577184,"sku":"Gem_YAGNdCeGlow_Rnd2","price":9.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4mm, avg. 0.4ct","offer_id":51857658609952,"sku":"Gem_YAGNdCe_Rnd4","price":19.0,"currency_code":"USD","in_stock":true},{"title":"Round, 5mm, avg. 0.7ct","offer_id":51857658642720,"sku":"Gem_YAGNdCe_Rnd5","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Round, 6mm, avg. 1.1ct","offer_id":51857658675488,"sku":"Gem_YAGNdCe_Rnd6","price":43.0,"currency_code":"USD","in_stock":true},{"title":"Round, 7mm, avg. 2ct","offer_id":51857658708256,"sku":"Gem_YAGNdCe_Rnd7","price":73.0,"currency_code":"USD","in_stock":true},{"title":"Round, 8mm, avg. 3ct","offer_id":51857658741024,"sku":"Gem_YAGNdCe_Rnd8","price":103.0,"currency_code":"USD","in_stock":true},{"title":"Round, 9mm, avg. 4.1ct","offer_id":51857658773792,"sku":"Gem_YAGNdCe_Rnd9","price":133.0,"currency_code":"USD","in_stock":true},{"title":"Round, 10mm, avg. 5.5ct","offer_id":51857658806560,"sku":"Gem_YAGNdCe_Rnd10","price":170.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Nd_Ce_YAG_Under_Normal_Light.jpg?v=1781302000"},{"product_id":"bullseye-faceted-stones","title":"Bullseye Faceted Stones","description":"\u003cp\u003eThese are faceted gems cut with a 'bullseye' effect. \u003c\/p\u003e\n\u003cp\u003eThese stones are cut from laser YAG (Ce+Nd Yttrium Aluminum Garnet). Some of the material we get is zoned, and careful cutting can put a fluorescent pink zone at the tip, giving a cool eye effect under UV.  Depending on the exact size of the zone the eye will be bigger or smaller, and it can reflect in really cool ways.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eYAG has a high hardness of 8.25-8.5 and no durability issues. It is ideal for use in jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Round Ce\/Nd YAG, 2.75mm, 0.11ct","offer_id":51859526680864,"sku":"Gem_Bullseye_00120260616","price":13.0,"currency_code":"USD","in_stock":false},{"title":"Round Ce\/Nd YAG, 2.95mm, 0.12ct","offer_id":51859526713632,"sku":"Gem_Bullseye_00220260616","price":13.0,"currency_code":"USD","in_stock":true},{"title":"Round Ce\/Nd YAG, 3mm, 0.14ct","offer_id":51859526746400,"sku":"Gem_Bullseye_00320260616","price":14.0,"currency_code":"USD","in_stock":false},{"title":"Round Ce\/Nd YAG, 3.8mm, 0.26ct","offer_id":51859526779168,"sku":"Gem_Bullseye_00420260616","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Round Ce\/Nd YAG, 4mm, 0.3ct","offer_id":51859526811936,"sku":"Gem_Bullseye_00520260616","price":22.0,"currency_code":"USD","in_stock":true},{"title":"Dark Tip Round Ce\/Nd YAG, 9.8mm, 4.7ct","offer_id":51859526844704,"sku":"Gem_Bullseye_00620260616","price":198.0,"currency_code":"USD","in_stock":false},{"title":"Square Ce\/Nd YAG, 2.9mm, 0.18ct","offer_id":51859526877472,"sku":"Gem_Bullseye_00720260616","price":16.0,"currency_code":"USD","in_stock":true},{"title":"Square Ce\/Nd YAG, 7.7mm, 1.84ct","offer_id":51859526910240,"sku":"Gem_Bullseye_00820260616","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Faceted_Bullseye_01260616.jpg?v=1781589259"},{"product_id":"faceted-zinc-sphalerite-white-zns-gemstones","title":"Faceted Zinc Sphalerite, White ZnS Gemstones","description":"\u003cp\u003eThese are faceted labmade Zinc Sphalerite (ZnS). While facet-grade sphalerite is only rarely found in nature (and usually has a dark red or orange color), and is very difficult to cut, if you're brave enough to cut it, the resulting stones have incredible fire and dispersion.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eColorless ZnS is grown for use for optics, and various doped versions are used as phosphors - if you have an old oscilloscope, the iconic blue or green display panel likely used ZnS to display.\u003c\/p\u003e\n\u003cp\u003eIt also has incredible optical properties, with a high RI of 2.36 and dispersion of 0.16, which make it an amazing gem when faceted. Cut stones are exceptionally beautiful with high brilliance and play of color.  Its major downsides are a hardness of 3.5-4 and perfect cleavage in multiple directions, making Sphalerite firmly a collector's stone. \u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Round, 6mm, avg. 0.9ct","offer_id":51859771949344,"sku":"Gem_ZnS_Rnd6","price":48.0,"currency_code":"USD","in_stock":true},{"title":"Round (Crackled), 6mm, avg. 0.9ct","offer_id":51859771982112,"sku":"Gem_ZnS_CrackleRnd6","price":48.0,"currency_code":"USD","in_stock":true},{"title":"Round, 8mm, avg. 2.5ct","offer_id":51859772014880,"sku":"Gem_ZnS_Rnd8","price":119.0,"currency_code":"USD","in_stock":true},{"title":"Round, 10mm, avg. 5ct","offer_id":51859772047648,"sku":"Gem_ZnS_Rnd10","price":215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/ZnS_Front_Photo.jpg?v=1781593493"}],"url":"https:\/\/store.gemsofscience.com\/collections\/calibrated-gems.oembed?page=2","provider":"Gems Of Science","version":"1.0","type":"link"}