2.42 Diamond & Sapphire Cocktail Ring in Platinum2. 42 Diamond Sapphire Cocktail Ring in Platinum. This one of a kind ring features 2. 42 carats of diamonds and . 72 carats of blue sapphires finished in platinum. Two (2) . 72 carat near colorless diamonds are channel set at the head of the ring. The primary diamonds are flanked by two (2) . 49 carat accent diamonds. At the cardinal points of the diamonds, two (2) . 20 carat and two (2) . 16 carat blue sapphires are set around the center stones. The