2.75 Carat, Blue Sapphire and Diamond Ring in 18K White Gold. Beautiful unisex ring. 1.50 Carat Blue Sapphire. Center stone is oval cut and set in prong setting. TCW of the diamonds are 1.25 carat and set in bead setting. VVS Clarity. Gorgeous stones, all stones are 100% natural. Earth Mined Blue Sapphire.