Vintage Style Diamond Stud Earrings w/ Sapphire Accents.  These dazzling modern diamond stud earrings really shine inside their sapphire halo! The Round Brilliant Cut diamonds are each .66 carats and surrounded by a gorgeous halo of French cut sapphires and bordered in milgrained platinum. The unique pointy shape that four of the sapphires culminate in give these studs a very sophisticated look.