Sterling Silver Gold-Flashed Elongated Cubic Zirconia Nano Turquoise Evil Eye Necklace - 18 Inch - in Sterling Silver - 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: turquoise ] - Usually 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. Dyed to enhance color. ::: [ Care and Handling: turquoise ] - Do not use ultrasonic cleaner or steamer. Avoid contact with cosmetics, hair spray, perfume and household chemicals. Clean with a damp cloth or soft brush. :::