Sterling Silver London Blue Topaz Amethyst and Diamond Ring - .01 Carat Diamond Weight 1.90 Carat Gemstone Weight in Sterling Silver - Ring Size Options: 10 5 6 7 8 9 [ Potential Enhancement Methods: amethyst ] - Almost all are heated to improve appearance or deepen color. [ Care and Handling: amethyst ] - Do not expose to intense heat. Clean with warm soapy water and a soft brush or cloth. [ Care and Handling: diamond ] - Clean with warm soapy water and a soft brush or cloth. [ 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.