Sterling Silver 4 Carat Simulated Diamond Stud Earrings. These classic studs total 4.0cttw, prong set in a 3-prong martini setting platinum bonded sterling silver with friction back posts. Both stones are set in platinum bonded sterling silver totaling four carats, 2ct in each ear for endless everyday sparkle. All stones and finishes are covered by full manufacturers warranty. Designed by Lafonn.