Sterling Silver Cubic Zirconia Black White Cultured Pearl Ring - in Sterling Silver - Product Attributes: - Freshwater cultured pearl - Cubic Zirconia - Polished - Ring Size Options: 6 7 8 [ 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. [ Potential Enhancement Methods: Cultured Pearl ] - Usually bleached and polished to achieve uniform color and shape. May be dyed or irradiated to produce various colors. [ Care and Handling: Cultured Pearl ] - Do not use ultrasonic cleaner or steamer. Avoid contact with cosmetics, hair spray, perfume and household chemicals. Clean with a soft cloth.