Metal Type: Sterling Silver Metal Stamp: 925 Gemstone Type: Created Opal, CZ Gemstone Cut: Round-Shape Gemstone Color: Choose Color Gemstone Creation Method: Simulated Face Measurements From South To North: 16mm (0.62") Center Stone Measurements: 8mm(0.31") Approximate Center Stone Carat Weight: 2.04Carat Changing Center Stone Color Changing Metal Color Resizing Art Deco Wedding Engagement Bridal Ring Baguette Round Simulated Diamond 925 Sterling Silver