Sterling Silver Simulated Onyx and Simulated Mother of Pearl Reversable Heart Pendant - Measures 30x19mm Wide - in Sterling Silver - Product Attributes: - Polished - Reversible - Solid - - Width of Item: 19 mm - Length of Item: 30 mm - Finish: Polished - - This Item Does Not Ship With a Chain - [ 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. - - [ Potential Enhancement Methods: Mother of Pearl ] - Usually bleached, dyed irradiated and/or coated to enhance color. - [ Care and Handling: Mother of Pearl ] - Clean with warm soapy water and a soft brush or cloth. -