14K White Gold Natural Purple Sapphire and Diamond Halo Earrings. The Purple Sapphires weigh 2 = .93 carats total and are natural in color, no heat has been applied. The color is bright medium Purple and are set in a 3-prong setting. The Halo of diamonds are 30 = .13 carats total E, VS. This is a posted earring with a friction back.