Metal Type: Sterling Silver Metal Stamp: 925 Gemstone Type: Lab White Opal, Simulated Diamond Gemstone Shape: Marquise, Round Gemstone Creation Method: Simulated Center Stone Size: 5mmx3mm Ring Measurements: 12mm Available in different metal colors & stone colors as well. Please message me for inquiry! Halo Vintage Art Deco Cascading Marquise Lab White Opal Wedding Engagement Bridal Ring Round Diamond Cz Accent Band 925 Sterling Silver