Sterling Silver Simulated Onyx and Diamond Ring - .04 Carat Diamond Weight 4.09 Carat Gemstone Weight in Sterling Silver - Product Attributes: - Cabochon - Fancy undercarriage - Polished - ::: ::: [ Care and Handling: diamond ] - Clean with warm soapy water and a soft brush or cloth. ::: ::: [ Potential Enhancement Methods: onyx ] - Occasionally stabilized with plastic to enhance durability. Sometimes powdered material is compressed with a binding agent under extreme pressure and heated to bind together small pieces of natural material into a larger whole. Always dyed to enhance the color ::: [ Care and Handling: onyx ] - Avoid exposure to extreme light and heat as stones may fade. Clean with warm soapy water and a soft brush or cloth. :::