Lafonn Triangular Y-Style Simulated Diamond Necklace. A new classic this Y necklace design is made of platinum bonded sterling silver. Pave set are .45cttw of Lassaire simulated round diamonds in two triangle shaped clusters. Necklace measures 17 inches in length, with a convertible 16 inch jump ring option. All Lafonn pieces come with a full lifetime manufacturers warranty.