7.5mm Stainless Steel Brushed and Polished Black Cubic Zirconia Hammered Ring - Size 8.5 - In Solid Stainless Steel - ::: Band Width: 7.5 mm ::: Finish: Polished & Brushed ::: ::: [ 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. :::