{"product_id":"bgo-20-pendant-rare-lab-sillenite-orange-bismuth-germanate","title":"BGO-20 Sterling Silver Pendants, Rare Lab Sillenite (Orange Bismuth Germanate)","description":"\u003cp\u003eThese are lab-grown BGO20 (Bismuth Germanate), a rare crystal grown for opto-electrical purposes with incredible sparkle and fire, set in 925 sterling silver pendants.\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, and requires extra care when worn in jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"BGO-20 Round Pendant A, 8mm, 6.1ct","offer_id":52186824147232,"sku":"Pend_BGO20_01320260811","price":188.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Round Pendant B, 8mm, 6.1ct","offer_id":52186824180000,"sku":"Pend_BGO20_01420260811","price":188.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Round Pendant C, 8mm, 6.1ct","offer_id":52186824212768,"sku":"Pend_BGO20_01520260811","price":188.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Round Pendant D, 8mm, 6.1ct","offer_id":52186824245536,"sku":"Pend_BGO20_01620260811","price":188.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Round Pendant E, 8mm, 6.1ct","offer_id":52186824278304,"sku":"Pend_BGO20_01720260811","price":188.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant A (chipped face), 10x8mm, ~6.7ct","offer_id":52186823754016,"sku":"Pend_BGO20_00120260811","price":166.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant B (chipped face), 10x8mm, ~6.7ct","offer_id":52186823786784,"sku":"Pend_BGO20_00220260811","price":166.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant C, 10x8mm, ~6.7ct","offer_id":52186823819552,"sku":"Pend_BGO20_00320260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant D, 10x8mm, ~6.7ct","offer_id":52186823852320,"sku":"Pend_BGO20_00420260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant E, 10x8mm, ~6.7ct","offer_id":52186823885088,"sku":"Pend_BGO20_00520260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant F, 10x8mm, ~6.7ct","offer_id":52186823917856,"sku":"Pend_BGO20_00620260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant G, 10x8mm, ~6.7ct","offer_id":52186823950624,"sku":"Pend_BGO20_00720260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant H, 10x8mm, ~6.7ct","offer_id":52186823983392,"sku":"Pend_BGO20_00820260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant I, 10x8mm, ~6.7ct","offer_id":52186824016160,"sku":"Pend_BGO20_00920260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant J, 10x8mm, ~6.7ct","offer_id":52186824048928,"sku":"Pend_BGO20_01020260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant K, 10x8mm, ~6.7ct","offer_id":52186824081696,"sku":"Pend_BGO20_01120260811","price":206.0,"currency_code":"USD","in_stock":true},{"title":"BGO-20 Pear Pendant L, 10x8mm, ~6.7ct","offer_id":52186824114464,"sku":"Pend_BGO20_01220260811","price":206.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/BGO_20_Pear_Pendant_Front_Photo.jpg?v=1786509713","url":"https:\/\/store.gemsofscience.com\/products\/bgo-20-pendant-rare-lab-sillenite-orange-bismuth-germanate","provider":"Gems Of Science","version":"1.0","type":"link"}