{"title":"Color Change","description":"\u003cp\u003eThese stones change color under different lighting!\u003c\/p\u003e","products":[{"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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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. Neodymium makes YAG a versatile laser crystal, and Nd YAG lasers are the most versatile and widely-used. While the original Nd YAG lasers only added Nd it was soon discovered that Ce could act as a booster to its power. This means that depending on the application you might see crystals that only have Nd or ones that are almost entirely Ce with just a pinch of Nd. Fortunately for us only the middle portion of the garnet crystals can be used for lasers and we were able to buy some of the unused tops to repurpose as gems.\u003cbr\u003e\u003cbr\u003ePure Nd gives a color shifting purple-pink color while pure Ce gives a rich fluorescent yellow color--when the two are mixed you get an unusual golden yellow color that shifts depending on the lighting. 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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YAG","description":"\u003cp\u003eThis is 'zombie' garnet, a type of lab-created YAG laser garnet with an unknown impurity granting it an unusual yellow-green color.  Some of these stones have minor inclusions.\u003c\/p\u003e\n\u003cp\u003eThis is an weird one, YAG doped with cerium and...something else?  This material occurs at the tips of some boules of Ce+Nd-doped laser YAG.  The variable yellow color and fluorescence all but guarantee it contains cerium, but the green color is very odd.  The result is a very strange look, a swampy yellow-green with an odd glow that makes it look almost opaque in some lighting.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThese 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. It is ideal for use in jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"2mm Round Cut avg. 0.05ct","offer_id":50833991336224,"sku":"Gem_Zomb_Rnd_2","price":7.0,"currency_code":"USD","in_stock":false},{"title":"3mm Round Cut avg. 0.15ct","offer_id":50830733738272,"sku":"Gem_Zomb_Rnd_3","price":9.0,"currency_code":"USD","in_stock":true},{"title":"4mm Round Cut avg. 0.40ct","offer_id":50830733771040,"sku":"Gem_Zomb_Rnd_4","price":14.0,"currency_code":"USD","in_stock":true},{"title":"5mm Round Cut avg. 0.80ct","offer_id":50830733803808,"sku":"Gem_Zomb_Rnd_5","price":28.0,"currency_code":"USD","in_stock":true},{"title":"6mm Round Cut avg. 1.1ct","offer_id":50830733836576,"sku":"Gem_Zomb_Rnd_6","price":38.0,"currency_code":"USD","in_stock":true},{"title":"7mm Round Cut avg. 2ct","offer_id":50830733869344,"sku":"Gem_Zomb_Rnd_7","price":70.0,"currency_code":"USD","in_stock":true},{"title":"8mm Round Cut avg. 2.5ct","offer_id":50830733902112,"sku":"Gem_Zomb_Rnd_8","price":87.0,"currency_code":"USD","in_stock":true},{"title":"9mm Round Cut avg. 3.7ct","offer_id":50830733934880,"sku":"Gem_Zomb_Rnd_9","price":129.0,"currency_code":"USD","in_stock":true},{"title":"10mm Round Cut avg. 5.2ct","offer_id":50830733967648,"sku":"Gem_Zomb_Rnd_10","price":182.0,"currency_code":"USD","in_stock":true},{"title":"11mm Round Cut avg. 8.1ct","offer_id":50830734000416,"sku":"Gem_Zomb_Rnd_11","price":283.0,"currency_code":"USD","in_stock":true},{"title":"3mm Hexagon Cut avg. 0.2ct","offer_id":50833991368992,"sku":"Gem_Zomb_Hex_3","price":11.0,"currency_code":"USD","in_stock":false},{"title":"4mm Hexagon Cut avg. 0.5ct","offer_id":50830734033184,"sku":"Gem_Zomb_Hex_4","price":17.0,"currency_code":"USD","in_stock":true},{"title":"5mm Hexagon Cut avg. 0.85ct","offer_id":50830734065952,"sku":"Gem_Zomb_Hex_5","price":29.0,"currency_code":"USD","in_stock":true},{"title":"6mm Hexagon Cut avg. 1.4ct","offer_id":50830734098720,"sku":"Gem_Zomb_Hex_6","price":49.0,"currency_code":"USD","in_stock":true},{"title":"7mm Hexagon Cut avg. 2.3ct","offer_id":50830734131488,"sku":"Gem_Zomb_Hex_7","price":80.0,"currency_code":"USD","in_stock":true},{"title":"8mm Hexagon Cut avg. 3.4ct","offer_id":50830734164256,"sku":"Gem_Zomb_Hex_8","price":119.0,"currency_code":"USD","in_stock":true},{"title":"9mm Hexagon Cut avg. 4.6ct","offer_id":50830734197024,"sku":"Gem_Zomb_Hex_9","price":161.0,"currency_code":"USD","in_stock":true},{"title":"10mm Hexagon Cut avg. 6.9ct","offer_id":50830734229792,"sku":"Gem_Zomb_Hex_10","price":241.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4.7mm, 0.57ct","offer_id":51858645745952,"sku":"FNT_Zomb_00520260607","price":25.0,"currency_code":"USD","in_stock":true},{"title":"Round, 4.7mm, 0.62ct","offer_id":51858645778720,"sku":"FNT_Zomb_00620260607","price":27.0,"currency_code":"USD","in_stock":true},{"title":"Fantasy Eye, 12mm, 9.2ct","offer_id":51858645614880,"sku":"FNT_Zomb_00120260607","price":281.0,"currency_code":"USD","in_stock":true},{"title":"Fantasy Hive, 13mm, 11.7ct","offer_id":51858645647648,"sku":"FNT_Zomb_00220260607","price":356.0,"currency_code":"USD","in_stock":true},{"title":"Fantasy Eye, 14mm, 13.1ct","offer_id":51858645680416,"sku":"FNT_Zomb_00320260607","price":398.0,"currency_code":"USD","in_stock":true},{"title":"Round 14.7mm 19.6ct","offer_id":51858645582112,"sku":"Gem_Zomb_Hex_002","price":523.0,"currency_code":"USD","in_stock":true},{"title":"Fantasy Oval, 10.7x13.3mm, 9.6ct","offer_id":51858645713184,"sku":"FNT_Zomb_00420260607","price":293.0,"currency_code":"USD","in_stock":true},{"title":"Oval 18.2x11.2mm 18.5ct","offer_id":51858645549344,"sku":"Gem_Zomb_Hex_001","price":479.0,"currency_code":"USD","in_stock":true},{"title":"Trillion, 4.4mm, 0.43ct","offer_id":51858645811488,"sku":"FNT_Zomb_00720260607","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Pear, 6.3x4mm, 0.45ct","offer_id":51858645844256,"sku":"FNT_Zomb_00820260607","price":21.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/YAG_Zombie_Front_Photo.jpg?v=1781580993"},{"product_id":"laser-rod-alexandrite-facet-rough-lab-created-crystals","title":"Laser Rod Alexandrite Facet Rough Lab Created Crystals","description":"\u003cp\u003eThese are genuine, lab-created alexandrite facet rough.  These pieces were sawn from laser rods, either during initial production or refurbishment efforts (don't worry, no laser-grade rods were harmed in the making of this rough!)\u003cbr\u003e\u003cbr\u003eWe recently got our hands on a few decommissioned rods of alexandrite from lasers! These rods likely lived out a full career inside lasers as a crystalline lasing medium, but eventually they were pushed too far or had dust land in the wrong spot and the ends blew off, rendering them inoperable.  In these cases the rods can sometimes be sawn and repolished, leaving pieces that are now usable for gems.  These may have also been removed during the initial production of the laser rods before they were used.  Either way, now they get to live out their retirement as gemstones! While they may have been designed for science they make amazing gems as well. They have a strong color change from blue-green to purple-pink and better yet often show flashes of both in mixed lighting when cut--the camera struggles to capture this, especially the green colors. On top of that they also show rich red fluorescence which affects their color, and the angle of lighting will also cause differences in color because this material is strongly trichroic.\u003cbr\u003e\u003cbr\u003eAlexandrite is the color-changing chromium-bearing variety of chrysoberyl, and it has been a popular gem since the first natural deposits were discovered in Russia. Its high hardness (8.5) and durability make it suitable even for ring wear, and that along with its incredible combination of colors has made it a classic. The only thing holding it back is its rarity. Oddly enough even lab-created alexandrite is quite uncommon. Synthetic alexandrite is mostly grown for industry, where it is used in some particular high-end laser systems, and the process to grow it is very expensive. Very little is produced anymore, and even when it was produced it was uncommon on the gem market. Usually instead lab-created sapphire with a color change effect was sold as alexandrite, but that material really can't hold a candle to alexandrite.\u003cbr\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"0.5-1g Darker Color 7mm Diameter 4-6mm Long","offer_id":50935620534560,"sku":"Alex_Rod_7_0.5g_D","price":30.0,"currency_code":"USD","in_stock":false},{"title":"0.5-1g Medium Color 7mm Diameter 4-6mm Long","offer_id":50935629316384,"sku":"Alex_Rod_7_0.5g_M","price":30.0,"currency_code":"USD","in_stock":true},{"title":"1-1.5g Lighter Color 7mm Diameter 7-10.5mm long","offer_id":47119914795296,"sku":"Alex_Rod_7_1g_L","price":45.0,"currency_code":"USD","in_stock":true},{"title":"1-1.5g Medium Color 7mm Diameter 7-10.5mm long","offer_id":50935605821728,"sku":"Alex_Rod_7_1g_M","price":45.0,"currency_code":"USD","in_stock":true},{"title":"1-1.5g Darker Color 7mm Diameter 7-10.5mm long","offer_id":50935605854496,"sku":"Alex_Rod_7_1g_D","price":45.0,"currency_code":"USD","in_stock":true},{"title":"1.5-2g 7mm Diameter 10.5-14mm Long","offer_id":50935651860768,"sku":"Alex_Rod_7_1.5g","price":60.0,"currency_code":"USD","in_stock":true},{"title":"2-2.5g 7mm Diameter 14-17.5mm Long","offer_id":50935605887264,"sku":"Alex_Rod_7_2g","price":75.0,"currency_code":"USD","in_stock":true},{"title":"2.5-3g 7mm Diameter 17.5-20mm Long","offer_id":50935629349152,"sku":"Alex_Rod_7_2.5g","price":90.0,"currency_code":"USD","in_stock":true},{"title":"3-3.5g 7mm Diameter 23-24mm Long","offer_id":50935629381920,"sku":"Alex_Rod_7_3g","price":105.0,"currency_code":"USD","in_stock":false},{"title":"3.5-4g 7mm Diameter 26.5-27.5mm Long","offer_id":50935605920032,"sku":"Alex_Rod_7_3.5g","price":120.0,"currency_code":"USD","in_stock":false},{"title":"0.5-1g 8mm Diameter 3.5-5.5mm Long","offer_id":50935651893536,"sku":"Alex_Rod_8_0.5g","price":40.0,"currency_code":"USD","in_stock":true},{"title":"0.5-1g Darker Color 8mm Diameter 3.5-5.5mm Long","offer_id":50935689740576,"sku":"Alex_Rod_8_0.5g_D","price":30.0,"currency_code":"USD","in_stock":true},{"title":"1-1.5g 8mm Diameter 5.5-8mm Long","offer_id":50935689773344,"sku":"Alex_Rod_8_1g","price":45.0,"currency_code":"USD","in_stock":false},{"title":"1.5-2g 8mm Diameter 8-10mm Long","offer_id":50935689806112,"sku":"Alex_Rod_8_1.5g","price":60.0,"currency_code":"USD","in_stock":false},{"title":"2-2.5g 8mm Diameter 10-12mm Long","offer_id":50935689838880,"sku":"Alex_Rod_8_2g","price":75.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/front.png?v=1763412056"},{"product_id":"laser-rod-alexandrite-faceted-stones-lab-created","title":"Laser Rod Alexandrite Faceted Stones Lab Created","description":"\u003cp\u003eThese are genuine, lab-grown alexandrite gems faceted from partial or decommissioned laser rods.  These have a bit lighter doping than our usual laser alexandrite which means the blue and green hues are more visible.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eWe recently got our hands on a few decommissioned rods of alexandrite from lasers! These rods likely lived out a full career inside lasers as their lasing medium, but eventually they were pushed too far and the ends blew off, rendering them inoperable--sometimes to salvage rods they can saw off ends and then repolish them, leaving behind orphaned alexandrite which we acquired for gem usage. Now they get to live out their retirement as gemstones! While they may have been designed for science they make amazing gems as well. They have a strong color change from blue-green to purple-pink and better yet often show flashes of both in mixed lighting. On top of that they also show rich red fluorescence which affects their color, and the angle of lighting will also cause differences in color because this material is strongly trichroic.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eAlexandrite is the color-changing chromium-bearing variety of chrysoberyl, and it has been a popular gem since the first natural deposits were discovered in Russia. Its high hardness (8.5) and durability make it suitable even for ring wear, and that along with its incredible combination of colors has made it a classic. The only thing holding it back is its rarity. Oddly enough even lab-created alexandrite is quite uncommon. Synthetic alexandrite is mostly grown for industry, where it is used in some particular high-end laser systems, and the process to grow it is very expensive. Very little is produced anymore, and even when it was produced it was uncommon on the gem market. Usually instead lab-created sapphire with a color change effect was sold as alexandrite, but that material really can't hold a candle to alexandrite.\u003cbr\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"3mm Round Cut avg. 0.13ct","offer_id":47179282448672,"sku":"Gem_AlexRod_Rnd_3","price":15.0,"currency_code":"USD","in_stock":false},{"title":"4mm Round Cut avg. 0.3ct","offer_id":50999919247648,"sku":"Gem_AlexRod_Rnd_4","price":25.0,"currency_code":"USD","in_stock":false},{"title":"5mm Round Cut avg. 0.55ct","offer_id":50999919280416,"sku":"Gem_AlexRod_Rnd_5","price":35.0,"currency_code":"USD","in_stock":false},{"title":"6mm Round Cut avg. 0.95ct","offer_id":50999919313184,"sku":"Gem_AlexRod_Rnd_6","price":57.0,"currency_code":"USD","in_stock":false},{"title":"7mm Round Cut avg. 1.5ct","offer_id":50999919345952,"sku":"Gem_AlexRod_Rnd_7","price":90.0,"currency_code":"USD","in_stock":false},{"title":"8mm Round Cut avg. 2.2ct","offer_id":50999919378720,"sku":"Gem_AlexRod_Rnd_8","price":132.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/frontcopy_3158a750-bc38-4912-a061-84a14024bddd.jpg?v=1764684403"},{"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. 0.8ct)","offer_id":47274257252640,"sku":"Gem_ErNd_Round_5","price":28.0,"currency_code":"USD","in_stock":true},{"title":"6mm Round (avg. 1ct)","offer_id":49519940534560,"sku":"Gem_ErNd_Round_6","price":35.0,"currency_code":"USD","in_stock":false},{"title":"7mm Round (avg. 2ct)","offer_id":49519940567328,"sku":"Gem_ErNd_Round_7","price":70.0,"currency_code":"USD","in_stock":true},{"title":"8mm Round (avg. 2.6ct)","offer_id":47274257285408,"sku":"Gem_ErNd_Round_8","price":91.0,"currency_code":"USD","in_stock":true},{"title":"9mm Round (avg. 3.6ct)","offer_id":49519940600096,"sku":"Gem_ErNd_Round_9","price":126.0,"currency_code":"USD","in_stock":true},{"title":"10mm Round (avg. 5.1ct)","offer_id":49519940632864,"sku":"Gem_ErNd_Round_10","price":178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/IMG_0064_1b58d8b7-8105-4baa-b88e-7f8f6fe1fac6.jpg?v=1760682478"},{"product_id":"laser-alexandrite-facet-rough-lab-created-crystals","title":"Laser Alexandrite Facet Rough, Lab Created Alex Crystals","description":"\u003cp\u003eThese are genuine, lab-created alexandrite facet rough, either sawn from the unusable parts of crystals grown for laser usage.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThis is a rarity in the gem world, synthetic alexandrite. Alexandrite is the color-changing chromium-bearing variety of chrysoberyl, and it has been a popular gem since the first natural deposits were discovered in Russia. Its high hardness (8.5) and durability, combined with its incredible combination of colors, have made it a classic.  The only limiting factor is its rarity which has kept it more obscure than gems like ruby and sapphire. Even lab-created alexandrite is quite uncommon. Synthetic alexandrite is mostly grown for industry, where it is used in some particular high-end laser systems, and the process to grow it is very expensive. Little is produced anymore, and even when it was produced it was uncommon on the gem market. Usually instead lab-created sapphire with a color change effect was sold as alexandrite, but that material is honestly boring compared to the real deal.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eReal synthetic alexandrite has a range of weird properties. It is trichroic, with three different colors visible depending on how the stone is oriented which also change depending on the lighting. These include green, red, purple and blue, and a well cut stone might show flashes of all of them in the right mix of lights. The material we have is also strongly fluorescent with a red glow which adds on top of the other colors. My camera struggles to capture the color change but it is very striking, even changing between direct sunlight and clouded sunlight.\u003cbr\u003e\u003cbr\u003eAlexandrite is the color-changing chromium-bearing variety of chrysoberyl, and it has been a popular gem since the first natural deposits were discovered in Russia. Its high hardness (8.5) and durability make it suitable even for ring wear, and that along with its incredible combination of colors has made it a classic. The only thing holding it back is its rarity. Oddly enough even lab-created alexandrite is quite uncommon. Synthetic alexandrite is mostly grown for industry, where it is used in some particular high-end laser systems, and the process to grow it is very expensive. Very little is produced anymore, and even when it was produced it was uncommon on the gem market. Usually instead lab-created sapphire with a color change effect was sold as alexandrite, but that material really can't hold a candle to alexandrite.\u003cbr\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"1pc Rough 0.5-1g","offer_id":48362406314272,"sku":"Rgh_Alex_0.5g","price":30.0,"currency_code":"USD","in_stock":false},{"title":"1pc Rough 1-1.5g","offer_id":48362406347040,"sku":"Rgh_Alex_1g","price":50.0,"currency_code":"USD","in_stock":true},{"title":"1pc Rough 1.5-2g","offer_id":50936135647520,"sku":"Rgh_Alex_1.5g","price":70.0,"currency_code":"USD","in_stock":true},{"title":"1pc Rough 2-2.5g","offer_id":50936135680288,"sku":"Rgh_Alex_2g","price":90.0,"currency_code":"USD","in_stock":true},{"title":"1pc Rough 2.5-3g","offer_id":48362406379808,"sku":"Rgh_Alex_2.5g","price":110.0,"currency_code":"USD","in_stock":true},{"title":"1pc Rough 3-4g","offer_id":47290723500320,"sku":"Rgh_Alex_3g","price":140.0,"currency_code":"USD","in_stock":true},{"title":"1pc Rough 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164.01g","offer_id":51880862449952,"sku":"Rgh_Alex_04220260618","price":5581.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/IMG_0009_1_84cded52-8beb-4a55-80e1-e7ba022b4384.jpg?v=1714434531"},{"product_id":"er-nd-soviet-laser-garnet-facet-rough-orange-pink-color-change-yag-facet-rough","title":"Er-Nd Soviet Laser Garnet Facet Rough, Orange\/Pink Color Change USSR YAG","description":"\u003cp\u003eThese are facet rough 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 they grew it.  We even have a good guess as to why this material didn't make the cut--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.\u003cbr\u003e\u003cbr\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.\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":"1pc under 1g (crumb)","offer_id":49968871375136,"sku":"Rough_YAGErNd_Crumb","price":8.0,"currency_code":"USD","in_stock":true},{"title":"1-2g rough","offer_id":47772023816480,"sku":"Rough_YAGErNd_1","price":16.0,"currency_code":"USD","in_stock":true},{"title":"2-3g rough","offer_id":47772118384928,"sku":"Rough_YAGErNd_2","price":25.0,"currency_code":"USD","in_stock":true},{"title":"3-4g rough","offer_id":47772118417696,"sku":"Rough_YAGErNd_3","price":34.0,"currency_code":"USD","in_stock":true},{"title":"4-5g rough","offer_id":47772118450464,"sku":"Rough_YAGErNd_4","price":43.0,"currency_code":"USD","in_stock":true},{"title":"5-6g rough","offer_id":47772118483232,"sku":"Rough_YAGErNd_5","price":51.0,"currency_code":"USD","in_stock":true},{"title":"6-7g rough","offer_id":47772118516000,"sku":"Rough_YAGErNd_6","price":58.0,"currency_code":"USD","in_stock":true},{"title":"7-8g rough","offer_id":47772118548768,"sku":"Rough_YAGErNd_7","price":65.0,"currency_code":"USD","in_stock":true},{"title":"8-9g rough","offer_id":47772118581536,"sku":"Rough_YAGErNd_8","price":72.0,"currency_code":"USD","in_stock":true},{"title":"9-10g rough","offer_id":47772118614304,"sku":"Rough_YAGErNd_9","price":78.0,"currency_code":"USD","in_stock":true},{"title":"10-11g rough","offer_id":47772118647072,"sku":"Rough_YAGErNd_10","price":84.0,"currency_code":"USD","in_stock":true},{"title":"11-12g rough","offer_id":47772147613984,"sku":"Rough_YAGErNd_11","price":92.0,"currency_code":"USD","in_stock":true},{"title":"12-13g rough","offer_id":47772147646752,"sku":"Rough_YAGErNd_12","price":100.0,"currency_code":"USD","in_stock":true},{"title":"13-14g rough","offer_id":49968866132256,"sku":"Rough_YAGErNd_13","price":108.0,"currency_code":"USD","in_stock":true},{"title":"Individual Piece, 14.7×14.2×13.6mm, 11.58g","offer_id":51423369494816,"sku":"Rough_YAGErNd_00120260404","price":94.0,"currency_code":"USD","in_stock":true},{"title":"Individual Piece, 16.6×15.3×10.2mm, 10.99g","offer_id":51423369527584,"sku":"Piece, 16.6×15.3×10.2mm, 10.99g","price":89.0,"currency_code":"USD","in_stock":false},{"title":"Individual Piece, 13.8×13.2×13.2mm, 10.67g","offer_id":51423369560352,"sku":"Rough_YAGErNd_00320260404","price":86.0,"currency_code":"USD","in_stock":true},{"title":"Individual Piece, 17.1×15.6×13.3mm, 14.19g","offer_id":51423369593120,"sku":"Piece, 17.1×15.6×13.3mm, 14.19g","price":115.0,"currency_code":"USD","in_stock":false},{"title":"Individual Piece, 18.8×15.1×11.1mm, 13.37g","offer_id":51423369625888,"sku":"Rough_YAGErNd_00520260404","price":108.0,"currency_code":"USD","in_stock":true},{"title":"Individual Piece, 22.2×21.9×21.4mm, 42.01g","offer_id":51423369658656,"sku":"Rough_YAGErNd_00620260404","price":337.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/USSR_YAG.jpg?v=1775343416"},{"product_id":"golden-laser-garnet-rods-nd-ce-yag","title":"YAG Laser Rods, Failed, Decommissioned or Offcuts","description":"\u003cp\u003eThese are partial and complete laser rods in a variety of different types of YAG (yttrium aluminum garnet), including pink and golden laser garnet ( Ce+Nd) and green laser garnet (CTH:YAG and Er+Cr:YSGG).  Some are offcuts that didn't quite make it into final production or usage, others are decommissioned rods that lived a full career in a laser.\u003c\/p\u003e\n\u003cp\u003eThese laser rods were meant for use in solid state lasers.  They would have had light pumped into them from the side, either by a lamp or by another laser, absorbed that energy and converted it into the powerful coherent beam that lasers are known for.\u003c\/p\u003e\n\u003cp\u003eNeodymium makes YAG a versatile laser crystal, and Nd YAG lasers are the most versatile and widely-used. While the original Nd YAG lasers only added Nd it was soon discovered that Ce could act as a booster to its power. This means that depending on the application you might see crystals that only have Nd or ones that are almost entirely Ce with just a pinch of Nd.  Pure Nd gives a color shifting purple-pink color while pure Ce gives a rich fluorescent yellow color--when the two are mixed you get an unusual pink, peach or golden yellow color depending on proportions that shifts depending on the lighting.  These 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.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eCTH YAG is used in far infrared lasers for a variety of purposes including medical procedures and meteorological measurements.  \u003c\/span\u003eLike normal Cr YAG (aka Christmas Garnet) it has a super rich green base color, but the addition of thulium quenches the fluorescence, allowing it to be absorbed by the holmium instead of released as red light. This means the base color does not have to compete with a red glow and comes out even richer and purer, giving it a very rich and vivid color.  Some of these are rods with polished ends, others are square and likely rod blanks (? or maybe just square rods).\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Green CTH YAG Rod 3.9mm diameter 130-150mm Long","offer_id":48362271605024,"sku":"Rod_CTH_3.9_130","price":48.0,"currency_code":"USD","in_stock":true},{"title":"Green CTH YAG Square rod 4.4mm 130-150mm Long","offer_id":48362283630880,"sku":"Rod_CTH_Sq_4.4_130","price":55.0,"currency_code":"USD","in_stock":true},{"title":"Pink Rod Segment 6-7mm Diameter Under 10mm Long Matte Finish","offer_id":50535697121568,"sku":"Rod_NdYAG_6_Sub10_M","price":5.0,"currency_code":"USD","in_stock":true},{"title":"Pink Rod Segment 6-7mm Diameter 10-20mm Long Matte Finish","offer_id":50239683461408,"sku":"Rod_NdYAG_6_10_M","price":8.0,"currency_code":"USD","in_stock":true},{"title":"Pink Rod Segment 6-7mm Diameter 20-30mm Long Matte Finish","offer_id":50239683494176,"sku":"Rod_NdYAG_6_20_M","price":12.0,"currency_code":"USD","in_stock":true},{"title":"Pink Rod Segment 6-7mm Diameter 30-40mm Long Matte Finish","offer_id":50239683526944,"sku":"Rod_NdYAG_6_30_M","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Pink Rod Segment 6-7mm Diameter 40-50mm Long Matte Finish","offer_id":50239683559712,"sku":"Rod_NdYAG_6_40_M","price":24.0,"currency_code":"USD","in_stock":true},{"title":"Pink Rod Segment 6-7mm Diameter 50-60mm Long Matte Finish","offer_id":50239683592480,"sku":"Rod_NdYAG_6_50_M","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Golden Rod Segment 5.9-7mm Diameter 15-22mm Long","offer_id":48210041798944,"sku":"Rod_CeNdYAG_5.9_15","price":25.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/20240429_162415.jpg?v=1714430062"},{"product_id":"orange-pink-lithium-niobate-facet-rough-erbium-linobate-lab-created","title":"Orange Pink Lithium Niobate Facet Rough, Erbium Linobate Lab Created","description":"\u003cp\u003eThis listing is for facet rough of lab created orange-pink lithium niobate. Each piece is labelled with its gram weight and letter in the photo and they can be purchased individually.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis is erbium-doped lithium niobate, a rare laser crystal which has been used in new breakthrough on-chip lasers.  The erbium allows it to act as a far infrared laser crystal but also gives it a gorgeous pink-to-orange color changing base color as well as strong green fluorescence.  Cut stones may have a green cast in direct lighting, and should otherwise resemble a pink diamond(!)\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLithium niobate (LiNbO3) is an unusual crystal with very interesting properties.  Colorless lithium niobate was once popular as a diamond simulant but it really isn't that good of one simply because it's much brighter and more dispersive than a diamond, with an RI of 2.3 and a dispersion of 0.13 (vs 0.044 for diamond--dispersion measures its ability to split white light into a rainbow).  That means cut stones give of brilliant rainbows of color, and it makes for an amazing gem in its own right for those reasons.\u003c\/p\u003e\n\u003cp\u003eNote its hardness is around 5 so LN is not a good stone for rings but is fine for lower-wear jewelry like pendants.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"1pc 1-2g","offer_id":50596173709600,"sku":"Rgh_LnEr_1","price":18.0,"currency_code":"USD","in_stock":false},{"title":"1pc 2-3g","offer_id":50596173742368,"sku":"Rgh_LnEr_2","price":30.0,"currency_code":"USD","in_stock":false},{"title":"1pc 3-4g","offer_id":48494768292128,"sku":"Rgh_LnEr_3","price":42.0,"currency_code":"USD","in_stock":false},{"title":"1pc 4-5g","offer_id":48494808858912,"sku":"Rgh_LnEr_4","price":54.0,"currency_code":"USD","in_stock":true},{"title":"1pc 5-6g","offer_id":48494808891680,"sku":"Rgh_LnEr_5","price":66.0,"currency_code":"USD","in_stock":true},{"title":"1pc 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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 Nd laser YAG, a type of lab created garnet used in lasers since 1964. It is still the most classic and widely-used variety. 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use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"3mm Round avg 0.2 ct (purple)","offer_id":50347521704224,"sku":"Gem_YAP_Rnd_3_Purp","price":10.0,"currency_code":"USD","in_stock":false},{"title":"3mm Round avg 0.2 ct (orange-pink)","offer_id":50347521736992,"sku":"Gem_YAP_Rnd_3_Oran","price":10.0,"currency_code":"USD","in_stock":false},{"title":"4mm Round 0.45 ct (purple)","offer_id":50347521769760,"sku":"Gem_YAP_Rnd_4_Purp","price":18.0,"currency_code":"USD","in_stock":true},{"title":"4mm Round avg 0.45 ct (orange-pink)","offer_id":50347521802528,"sku":"Gem_YAP_Rnd_4_Oran","price":18.0,"currency_code":"USD","in_stock":true},{"title":"5mm Round avg 0.85 ct (purple)","offer_id":50347521835296,"sku":"Gem_YAP_Rnd_5_Purp","price":34.0,"currency_code":"USD","in_stock":true},{"title":"5mm Round avg 0.85 ct Round (orange-pink)","offer_id":50347521868064,"sku":"Gem_YAP_Rnd_5_Oran","price":34.0,"currency_code":"USD","in_stock":false},{"title":"6mm Round 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Because even a few parts per million of iron will interact with titanium ions and produce a dark blue, there's nowhere on Earth a crystal like this could grow naturally.\u003c\/p\u003e\n\u003cp\u003eIn fact, the purity required is so high that titanium sapphire doesn't get grown with cheaper lab methods either - flame fusion setups have a hard time obtaining the extreme chemical purity needed for pink titanium sapphire.\u003c\/p\u003e\n\u003cp\u003eWhen it's grown with industrial purity, however, however, the resulting crystal is a bright padparascha-like pink color which shifts between a starburst pink and a more pink-orange depending on the lighting. 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.\u003c\/p\u003e\n\u003cp\u003eWith a hardness of 9 sapphire is ideal for use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"23.5ct","offer_id":50066302075168,"sku":"Carving_Strawberry_Ti_001","price":117.0,"currency_code":"USD","in_stock":true},{"title":"24.2ct","offer_id":50066302107936,"sku":"Carving_Strawberry_Ti_002","price":121.0,"currency_code":"USD","in_stock":true},{"title":"26.5ct B","offer_id":50066302173472,"sku":"Carving_Strawberry_Ti_003","price":132.0,"currency_code":"USD","in_stock":true},{"title":"30.5ct A","offer_id":50066302239008,"sku":"Carving_Strawberry_Ti_004","price":152.0,"currency_code":"USD","in_stock":true},{"title":"30.5ct B","offer_id":50066302271776,"sku":"Carving_Strawberry_Ti_005","price":152.0,"currency_code":"USD","in_stock":true},{"title":"31.5ct","offer_id":50066302304544,"sku":"Carving_Strawberry_Ti_006","price":157.0,"currency_code":"USD","in_stock":false},{"title":"33.2ct","offer_id":50066302337312,"sku":"Carving_Strawberry_Ti_007","price":166.0,"currency_code":"USD","in_stock":true},{"title":"82ct","offer_id":50066302370080,"sku":"Carving_Strawberry_Ti_008","price":256.0,"currency_code":"USD","in_stock":true},{"title":"84ct","offer_id":50066302402848,"sku":"Carving_Strawberry_Ti_009","price":268.0,"currency_code":"USD","in_stock":false},{"title":"Strawberry, 9.8ct","offer_id":50964359872800,"sku":"CRV_Ti_Straw_00120251124","price":78.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 12.6ct","offer_id":50964359905568,"sku":"CRV_Ti_Straw_00220251124","price":100.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 14ct","offer_id":50964359938336,"sku":"CRV_Ti_Straw_00320251124","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 14.4ct","offer_id":50964359971104,"sku":"CRV_Ti_Straw_00420251124","price":112.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 15.1ct","offer_id":50964360003872,"sku":"CRV_Ti_Straw_00520251124","price":117.0,"currency_code":"USD","in_stock":false},{"title":"Strawberry, 18.6ct","offer_id":50964360036640,"sku":"CRV_Ti_Straw_00620251124","price":139.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 19.1ct","offer_id":50964360069408,"sku":"CRV_Ti_Straw_00720251124","price":142.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 19.5ct","offer_id":50964360102176,"sku":"CRV_Ti_Straw_00820251124","price":144.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 20.2ct","offer_id":50964360134944,"sku":"CRV_Ti_Straw_00920251124","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 21.7ct","offer_id":50964360167712,"sku":"CRV_Ti_Straw_01020251124","price":157.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 23ct","offer_id":50964360200480,"sku":"CRV_Ti_Straw_01120251124","price":164.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 24.2ct","offer_id":50964360233248,"sku":"CRV_Ti_Straw_01220251124","price":170.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 26.2ct","offer_id":50964360266016,"sku":"CRV_Ti_Straw_01320251124","price":180.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 28.1ct","offer_id":50964360298784,"sku":"CRV_Ti_Straw_01420251124","price":189.0,"currency_code":"USD","in_stock":false},{"title":"Strawberry, 32ct","offer_id":50964360331552,"sku":"CRV_Ti_Straw_01520251124","price":205.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 33.1ct","offer_id":50964360364320,"sku":"CRV_Ti_Straw_01620251124","price":210.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 36.6ct","offer_id":50964360397088,"sku":"CRV_Ti_Straw_01720251124","price":222.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 38.2ct","offer_id":50964360429856,"sku":"CRV_Ti_Straw_01820251124","price":227.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 56ct","offer_id":50964360462624,"sku":"CRV_Ti_Straw_01920251124","price":280.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 60.7ct","offer_id":50964360495392,"sku":"CRV_Ti_Straw_02020251124","price":304.0,"currency_code":"USD","in_stock":true},{"title":"Strawberry, 67ct","offer_id":50964360528160,"sku":"CRV_Ti_Straw_02120251124","price":335.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/thumbstraw.jpg?v=1744052346"},{"product_id":"pink-laser-sapphire-cabochons-titanium-strawberry-sapphire-copy","title":"Pink Laser Sapphire Cabochons, Titanium Strawberry Sapphire","description":"\u003cp\u003eThese are cabochons cut from titanium laser sapphire. These labgrown sapphires have bubbles in them from the growth process -- we call this variety 'strawberry sapphires' since they have seeds, hence the carvings.  The bubbles have a directional flow to them, following the movement of the sapphire melt during crysatllization, and many are deep blue-black due to iron contamination.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eTitanium sapphire is a very unusual variety of sapphire, never found in nature. Because even a few parts per million of iron will interact with titanium ions and produce a dark blue, there's nowhere on Earth a crystal like this could grow naturally.\u003c\/p\u003e\n\u003cp\u003eIn fact, the purity required is so high that titanium sapphire doesn't get grown with cheaper lab methods either - flame fusion setups have a hard time obtaining the extreme chemical purity needed for pink titanium sapphire.\u003c\/p\u003e\n\u003cp\u003eWhen it's grown with industrial purity, however, however, the resulting crystal is a bright padparascha-like pink color which shifts between a starburst pink and a more pink-orange depending on the lighting. 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.\u003c\/p\u003e\n\u003cp\u003eWith a hardness of 9 sapphire is ideal for use in all kinds of jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"25ct Sugarloaf","offer_id":50066340479264,"sku":"Cab_Strawberry_001","price":65.0,"currency_code":"USD","in_stock":false},{"title":"26.1ct","offer_id":50066364268832,"sku":"Cab_Strawberry_002","price":70.0,"currency_code":"USD","in_stock":false},{"title":"27ct B","offer_id":50066364334368,"sku":"Cab_Strawberry_003","price":75.0,"currency_code":"USD","in_stock":true},{"title":"27.6ct","offer_id":50066364367136,"sku":"Cab_Strawberry_004","price":77.0,"currency_code":"USD","in_stock":false},{"title":"28.4ct","offer_id":50066364399904,"sku":"Cab_Strawberry_005","price":84.0,"currency_code":"USD","in_stock":false},{"title":"35.3ct A","offer_id":50066364432672,"sku":"Cab_Strawberry_006","price":92.0,"currency_code":"USD","in_stock":false},{"title":"35.3ct B","offer_id":50066364465440,"sku":"Cab_Strawberry_007","price":92.0,"currency_code":"USD","in_stock":true},{"title":"41.4ct","offer_id":50066364563744,"sku":"Cab_Strawberry_008","price":110.0,"currency_code":"USD","in_stock":true},{"title":"43.6ct","offer_id":50066364629280,"sku":"Cab_Strawberry_009","price":124.0,"currency_code":"USD","in_stock":true},{"title":"52.7ct","offer_id":50066364662048,"sku":"Cab_Strawberry_010","price":165.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/IMG_0080front.jpg?v=1744053756"},{"product_id":"perovskite-laser-rods-vintage-soviet-yap-crystals","title":"Perovskite Laser Rods, Vintage Soviet YAP Crystals","description":"\u003cp\u003eThese are partial and complete laser rods of yttrium aluminum perovskite (YAP).  As far as we know these are offcuts and failed rods that didn't quite make it into final production or usage.\u003c\/p\u003e\n\u003cp\u003eThese laser rods were meant for use in solid state lasers.  They would have had light pumped into them from the side, either by a lamp or by another laser, absorbed that energy and converted it into the powerful coherent beam that lasers are known for.\u003c\/p\u003e\n\u003cp\u003ePerovskite is a really unusual laser crystal!  It was grown back in the 80s in the Soviet Union, presumably as an alternative to YAG, but it really never caught on and is rarely grown today.  These rods and rod segments didn't quite make it into lasers as far as we can tell--most are offcuts with broken ends and even the complete ones lack the final coatings we'd expect.  I don't even know why they were experimenting with this unusual crystal--it has a higher density, refractive index and hardness than YAG, so perhaps its improved physical characteristics helped in some niche applications.  I doubt we'll ever be able to get more once our stockpile runs out.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Rod Segment 3mm Diameter 20-25mm Long","offer_id":50221974978848,"sku":"LaserRod_YAP_3mm_20","price":15.0,"currency_code":"USD","in_stock":true},{"title":"Rod Segment 3mm Diameter 25-30mm Long","offer_id":50221975011616,"sku":"LaserRod_YAP_3mm_25","price":20.0,"currency_code":"USD","in_stock":true},{"title":"Rod Segment 3mm Diameter 30-35mm Long","offer_id":50864493461792,"sku":"LaserRod_YAP_3mm_30","price":23.0,"currency_code":"USD","in_stock":false},{"title":"Rod Segment 3mm Diameter 35-40mm Long","offer_id":50221975044384,"sku":"LaserRod_YAP_3mm_35","price":25.0,"currency_code":"USD","in_stock":true},{"title":"Rod Segment 3mm Diameter 40-45mm Long","offer_id":50864493494560,"sku":"LaserRod_YAP_3mm_40","price":27.0,"currency_code":"USD","in_stock":false},{"title":"Rod Segment 3mm Diameter 45-50mm Long","offer_id":50221975077152,"sku":"LaserRod_YAP_3mm_45","price":30.0,"currency_code":"USD","in_stock":false},{"title":"Rod Segment 6mm Diameter 30-35mm Long","offer_id":50221975109920,"sku":"LaserRod_YAP_6mm_30","price":45.0,"currency_code":"USD","in_stock":true},{"title":"Rod Segment 6mm Diameter 40-45mm Long","offer_id":50221975142688,"sku":"LaserRod_YAP_6mm_40","price":55.0,"currency_code":"USD","in_stock":true},{"title":"Rod Segment 6mm Diameter 50-55mm Long","offer_id":50221975175456,"sku":"LaserRod_YAP_6mm_50","price":65.0,"currency_code":"USD","in_stock":true},{"title":"Rod Segment 6mm Diameter 60-65mm Long","offer_id":50221975208224,"sku":"LaserRod_YAP_6mm_60","price":75.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/frontphoto.png?v=1748206984"},{"product_id":"nd-glass-laser-rods-failed-fusion-laser-rods-and-segments","title":"Nd Glass Laser Rods, Failed Fusion(?) 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Note the camera can't capture the true color!  There is a red glow to these stones thanks to their strong fluorescence but it doesn't dominate like it does in the photos.  These gems have flashes of red, blue and purple depending on the lighting that shift and swirl as the stone is turned.\u003c\/p\u003e\n\u003cp\u003eWe recently got our hands on a few alexandrite crystal heads!  When alexandrite crystals are grown the top region is less pure and often has some bubbles which require it to be removed before they cut the rest of the crystal into laser rods.  Fortunately it is possible to trim out pieces that are great for gem usage even if they weren't quite laser grade.  These stones are really cool to look at!  Their color change is strong, and shows up under different kinds of LEDs and even from looking at them with the center of your vision vs the edge. On top of that they also show rich red fluorescence which affects their color, and the angle of lighting will also cause differences in color because this material is strongly trichroic.\u003cbr\u003e\u003cbr\u003eAlexandrite is the color-changing chromium-bearing variety of chrysoberyl, and it has been a popular gem since the first natural deposits were discovered in Russia. Its high hardness (8.5) and durability make it suitable even for ring wear, and that along with its incredible combination of colors has made it a classic. The only thing holding it back is its rarity. Oddly enough even lab-created alexandrite is quite uncommon. Synthetic alexandrite is mostly grown for industry, where it is used in some particular high-end laser systems, and the process to grow it is very expensive. Very little is produced anymore, and even when it was produced it was uncommon on the gem market. Usually instead lab-created sapphire with a color change effect was sold as alexandrite, but that material really can't hold a candle to alexandrite.\u003cbr\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Rectangle, 18x9mm, ~8.85ct","offer_id":51039626101024,"sku":"FNT_Alex_Rect_18x9","price":487.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 15x11mm, ~11ct","offer_id":51039626133792,"sku":"FNT_Alex_Rect_15x11","price":589.0,"currency_code":"USD","in_stock":true},{"title":"Rectangle, 15.5x11.5mm, ~11.1ct","offer_id":51039626166560,"sku":"FNT_Alex_Rect_15.5x11.5","price":593.0,"currency_code":"USD","in_stock":true},{"title":"Oval, 15.5x11.5mm, ~9.25ct","offer_id":51039626199328,"sku":"FNT_Alex_Oval_15.5x11.5","price":507.0,"currency_code":"USD","in_stock":false},{"title":"Oval, 17.5x13.5mm, ~14.2ct","offer_id":51039626232096,"sku":"FNT_Alex_Oval_17.5x13.5","price":727.0,"currency_code":"USD","in_stock":true},{"title":"Oval, 19x13mm, 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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":"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":"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":"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":"laser-alexandrite-jewelry","title":"Laser Alexandrite Jewelry (Fluorescent Lab Alex, Chromium Chrysoberyl)","description":"\u003cp\u003eThese laser alexandrites are set in 925 sterling silver.\u003c\/p\u003e\n\u003cp\u003eThese are genuine, lab-created alexandrite gems faceted from crystals grown for lasers. Note the camera can't capture the true color!  There is a red glow to these stones thanks to their strong fluorescence but it doesn't dominate like it does in the photos.  These gems have flashes of red, blue and purple depending on the lighting that shift and swirl as the stone is turned.\u003c\/p\u003e\n\u003cp\u003eWe recently got our hands on a few alexandrite crystal heads!  When alexandrite crystals are grown the top region is less pure and often has some bubbles which require it to be removed before they cut the rest of the crystal into laser rods.  Fortunately it is possible to trim out pieces that are great for gem usage even if they weren't quite laser grade.  These stones are really cool to look at!  Their color change is strong, and shows up under different kinds of LEDs and even from looking at them with the center of your vision vs the edge. On top of that they also show rich red fluorescence which affects their color, and the angle of lighting will also cause differences in color because this material is strongly trichroic.\u003cbr\u003e\u003cbr\u003eAlexandrite is the color-changing chromium-bearing variety of chrysoberyl, and it has been a popular gem since the first natural deposits were discovered in Russia. Its high hardness (8.5) and durability make it suitable even for ring wear, and that along with its incredible combination of colors has made it a classic. The only thing holding it back is its rarity. Oddly enough even lab-created alexandrite is quite uncommon. Synthetic alexandrite is mostly grown for industry, where it is used in some particular high-end laser systems, and the process to grow it is very expensive. Very little is produced anymore, and even when it was produced it was uncommon on the gem market. Usually instead lab-created sapphire with a color change effect was sold as alexandrite, but that material really can't hold a candle to alexandrite.\u003cbr\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Pendant with Fantasy Cut 10mm Round","offer_id":51488145965344,"sku":"Pnd_AlexFant_Rnd10","price":499.0,"currency_code":"USD","in_stock":false},{"title":"Pendant with 10mm Standard Round","offer_id":51488145998112,"sku":"Pnd_Alex_Rnd10","price":465.0,"currency_code":"USD","in_stock":true},{"title":"Stud Earrings with 8mm Rounds (pair)","offer_id":51488146030880,"sku":"Stud_Alex_Rnd8","price":387.0,"currency_code":"USD","in_stock":true},{"title":"Pendant with 12x8mm Pixel Cut","offer_id":51488382779680,"sku":"Pnd_Alex_Pixel12x8","price":629.0,"currency_code":"USD","in_stock":true},{"title":"Dangle Earrings with 8mm Rounds (pair)","offer_id":51819620991264,"sku":"Ear_Alex_Dangle_Rnd8","price":456.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Round_Alexandrite_Pendant.jpg?v=1774236179"},{"product_id":"pure-nd-yag-jewelry-violet-laser-garnet-in-sterling-silver","title":"Pure Nd:YAG Jewelry, Violet Laser Garnet in Sterling Silver","description":"\u003cp\u003eThese are violet Nd laser garnets set in sterling silver. \u003c\/p\u003e\n\u003cp\u003eThese 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\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":"4-Sided Obelisk Pendant (approx 23 mm long, 4 mm wide)","offer_id":51367798047008,"sku":"pend_nd_obelisk4","price":186.0,"currency_code":"USD","in_stock":true},{"title":"Round Stud Earring (8mm) Pair","offer_id":51372405162272,"sku":"stud_yagnd_rnd8","price":189.0,"currency_code":"USD","in_stock":true},{"title":"Cushion Stud Earring (8mm) Pair","offer_id":51372405195040,"sku":"stud_yagnd_cush8","price":191.0,"currency_code":"USD","in_stock":true},{"title":"Trillion Stud Earring (8mm) Pair","offer_id":51372405227808,"sku":"stud_yagnd_tri8","price":212.0,"currency_code":"USD","in_stock":true},{"title":"Cufflink Pair (~10mm square)","offer_id":51367798014240,"sku":"cufflink_yagnd","price":342.0,"currency_code":"USD","in_stock":true},{"title":"Round Pendant 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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 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