Lafonn Swirled Halo Simulated Diamond Necklace. This classically styled halo necklace with a twist is made of platinum bonded sterling silver. Pave set are 1.65cttw of Lassaire simulated round diamonds in a swirled double halo design accenting a 1ct sized center stone. Necklace measures 18 inches in length, with a convertible 17 inch jump ring option. All Lafonn pieces come with a full lifetime manufacturers warranty.