Sterling Silver Rhodium-plated Simulated Opal Purple Cubic Zirconia Post Earrings - in Sterling Silver - Width of Item: 11.5 mm - Length of Item: 22 mm - Earring Closure: Post & Push Back - Earring Type: Drop & Dangle - Finish: Polished - 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: cubic zirconia ] - Synthetic. Some are covered with a product that makes the stone more durable. ::: [ Care and Handling: cubic zirconia ] - Clean with warm soapy water and a soft cloth. ::: ::: [ 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. :::