Sterling Silver Plated White 6x6mm Freshwater Cultured Pearl and Cubic Zirconia Round Screw-Back Earrings - Measures 9x9mm - in Sterling Silver Rhodium Plated - Gift ready jewelry box included ::: [ 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. :::