Oval Sapphire & Diamond Halo Earrings in PlatinumOval Sapphire Diamond Halo Earrings in Platinum. These modern sapphire and diamond studs have such a sparkling appearance! The earrings feature two (2) 1. 25 carat oval cut sapphires wreathed in . 24 carats of round brilliant cut diamonds and are set in platinum. The sapphires are set using thick prongs with a high polish that together with the diamonds give plenty of bright sparkle to contrast the deep blue. These would be perfect for a fancy evening