Sterling Silver Rhodium Blue Topaz Birthstone Vibrant Earrings - .20 Carat Gemstone Weight in Sterling Silver - Width of Item: 7.5 mm - Length of Item: 14 mm - Earring Closure: Post & Push Back - Earring Type: Birthstone - Finish: Polished - Feature: Solid - 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: blue topaz ] - Usually irradiated and heated to produce color. Some topaz may be coated with a thin film of minerals applied through heat. ::: [ Care and Handling: blue topaz ] - Clean with warm soapy water and a soft brush or cloth. :::