Emerald Cut Sapphire & Diamond Ring in PlatinumEmerald Cut Sapphire Diamond in Ring in Platinum. This modern cocktail ring features a 2. 80 carat emerald cut sapphire with . 45 carats of round accent diamonds and is set in platinum. The shank is quite thick and splits and comes back together twice, creating a strong look with nice negative space. The design shows a lot of metal with neat notches taken out of the sides where the accent diamonds are set and the ring is quite heavy at 10. 6 grams.