Sterling Silver Open Cubic Zirconia Square and Hanging Full Square Cubic Zirconia Post Dangle Earrings - in Sterling Silver - Width of Item: 20 mm - Length of Item: 38 mm - Earring Closure: Post & Push Back - Earring Type: Drop & Dangle - Finish: Polished Open back ; 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. :::