6 Carat Sapphire Earrings w/ Diamond Halo in Platinum6 Carat Sapphire Earrings w Diamond Halo in Platinum. These brilliant stud earrings feature two (2) 3. 15 cushion cut sapphires wrapped in 2. 60 carats diamond halo. The sapphires are prong set in platinum which furthers the icy look created by the contrast between the diamonds. These elegant studs would be amazing with your finest evening wear.