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orange-red.\u003c\/p\u003e\n\u003cp\u003eNote that while lithium niobate makes an amazing gemstone its relatively low hardness of 5.5 limits it to pendant and earring usage in jewelry.\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"Light 5mm Round Cut avg. 0.7ct","offer_id":50586676625696,"sku":"LNFe_Rnd_5","price":24.0,"currency_code":"USD","in_stock":false},{"title":"Light 5.5mm Round Cut avg. 1ct","offer_id":50586851246368,"sku":"LNFe_Rnd_5.5","price":35.0,"currency_code":"USD","in_stock":false},{"title":"Light 6mm Round Cut avg. 1.3ct","offer_id":50586676658464,"sku":"LNFe_Rnd_6","price":45.0,"currency_code":"USD","in_stock":false},{"title":"Light 6.5mm Round Cut avg. 1.5ct","offer_id":50586851279136,"sku":"LNFe_Rnd_6.5","price":52.0,"currency_code":"USD","in_stock":false},{"title":"Light 7mm Round Cut avg. 1.7ct","offer_id":50586676691232,"sku":"LNFe_Rnd_7","price":59.0,"currency_code":"USD","in_stock":true},{"title":"Light 7.5mm Round Cut avg. 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