20mm Sterling Silver Rhodium-plated Blue Inlay Simulated Opal Sea Life Bracelet - 7 Inch - in Sterling Silver - Width of Item: 20 mm - Length of Item: 7 in - Chain Length: 7 in - Chain Width: 7.4 mm - Clasp /Connector: Lobster (Fancy) - Finish: Polished - Feature: Solid - Clasp Width (Male end): 5.09 mm - Clasp Width (Female end): 3.33 mm - All of our jewelry for women and men are authenticated with a 10K or 14K hallmark and are tested to pass FTC regulations. ::: [ Potential Enhancement Methods: opal ] - Occasionally treated to enhance the color. Sometimes infused with wax, oil or plastic to enhance appearance and durability. ::: [ Care and Handling: opal ] - Do not use ultrasonic cleaner or steamer. Avoid heat and contact with cosmetics, hair spray, perfume and household chemicals. Clean with a damp cloth or soft brush. :::