This sterling silver pendant features a 0.70 ct. t.w. created opal and a 0.036 ct. t.w. diamond that measures 23.19-mm. length x 10.70-mm. width and hangs on an 18-in. length chain. Almost all gemstones have been treated to enhance their color and require special care. Imported Material & Care Sterling Silver, Diamond, Created Opal Clean with a soft bristle brush or cloth and warm soapy water. Use silver polishing cloth on silver items.