Sterling Silver Rhodium-plated Three 1.5mm Interlocking Cubic Zirconia Rings - Size 7 - in Sterling Silver - Band Width: 1.5 mm - Finish: Polished - Feature: Solid - Feature 2: Closed Back - 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. :::