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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. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis 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","brand":"Turtle's Hoard","offers":[{"title":"2.8ct Rectangle Cut 8.3x4.5mm With Bubbles","offer_id":50699756568864,"sku":"Gem_GAGG_Hi_044","price":168.0,"currency_code":"USD","in_stock":false},{"title":"2.88ct Rectangle Cut 7.7x5.1mm Long Bubbles","offer_id":50699756601632,"sku":"Gem_GAGG_Hi_045","price":172.0,"currency_code":"USD","in_stock":false},{"title":"3.10ct Rectangle Cut 8.2x5.5mm With bubbles","offer_id":50699756699936,"sku":"Gem_GAGG_Hi_048","price":186.0,"currency_code":"USD","in_stock":false},{"title":"3.66ct Rectangle Cut 8.9x5.1mm","offer_id":50701305053472,"sku":"Gem_GAGG_Hi_100","price":219.0,"currency_code":"USD","in_stock":false},{"title":"3.70ct Square cut 7.4mm","offer_id":50699767284000,"sku":"Gem_GAGG_Hi_053","price":222.0,"currency_code":"USD","in_stock":false},{"title":"4.11ct Square Cut 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