Sterling Silver Classic Round Halo Simulated Diamond Necklace. This classic halo necklace is platinum bonded sterling silver and has .63cttw of round Lassaire simulated diamonds. Necklace measures 18 inches in length with adjustment jump rings for 17 and 16 inches. Designed by Lafonn, all Lafonn pieces come with a full lifetime manufacturers warranty. Also available in rose and yellow gold plated sterling silver.