This sterling silver pendant features a 1.33 ct. t.w. heart shape peridot and measures 16.5-mm. in length and 9.5-mm. in width, on an 18-in. chain. Almost all gemstones have been treated to enhance their beauty and require special care. 1 Peridot Imported Care Clean with a soft bristle brush and warm soapy water. Use silver polishing cloth on silver items.