925 Sterling Silver Square Blue Opal Ring with CZ Stones - Sterling Silver October Birthstone Rings Face Height: 7 mm (0.28 inch) Stone: Blue Lab Opal, AAA Grade Clear CZs - Prong Set (not glued) Made with 925 Sterling Silver with Prong Set Stones (not glued) Rhodium plated to prevent tarnish and color change Gift wrap options available at checkout for under $0.99