{"product_id":"calibrated-optical-fluorite-gemstones","title":"Calibrated Optical Fluorite Gemstones","description":"\u003cp\u003eThese are loose calibrated faceted stones of lab fluorite, \u003cspan style=\"font-size: 0.875rem;\"\u003ecut into calibrated stones of various sizes.  These were grown for optics - fluorite has the lowest RI and dispersion of of any gem which means minimal chromatic aberration.  Since they're for use in optics, they do not have any fluorescence.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eYou might be wondering \"why are fluorite gems is so rare when it's so cool?\" That's because fluorite is a really tricky material to cut.  It has low Moh's hardness (rank 4 on the scale), and on top of that has four perfect cleavage planes - it wants to break into perfect octahedrons.  Therefore, it requires extreme care when cutting or setting - any mistake, and the gem can split in half.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Cushion, 4mm, ~0.35ct","offer_id":52212600209696,"sku":"Gem_OpticCaF2_CUSH4","price":17.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 5mm, ~0.55ct","offer_id":52212600242464,"sku":"Gem_OpticCaF2_CUSH5","price":24.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 6mm, ~1ct","offer_id":52212600275232,"sku":"Gem_OpticCaF2_CUSH6","price":40.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 7mm, ~1.8ct","offer_id":52212600308000,"sku":"Gem_OpticCaF2_CUSH7","price":66.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 8mm, ~2.7ct","offer_id":52212600340768,"sku":"Gem_OpticCaF2_CUSH8","price":94.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 9mm, ~3.4ct","offer_id":52212600373536,"sku":"Gem_OpticCaF2_CUSH9","price":114.0,"currency_code":"USD","in_stock":true},{"title":"Cushion, 10mm, ~4.9ct","offer_id":52212600406304,"sku":"Gem_OpticCaF2_CUSH10","price":153.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6794\/0384\/files\/Fluorite_Cushions_Front_Photo.jpg?v=1787203344","url":"https:\/\/store.gemsofscience.com\/products\/calibrated-optical-fluorite-gemstones","provider":"Gems Of Science","version":"1.0","type":"link"}