StarGems(tm) Sterling Silver Natural Dendritic Opal (Unique Design Antique style) Ring, US Size 7.5 100% Solid Sterling Silver with 925 stamp, Total Weight(grams): 13.2g Guaranteed authentic gemstone(s), Exclusive craftsmanship and styling, actual item pictured, Main stone size: 17.6(L)x22.4(W)mm Exclusive craftsmanship and styling, actual item pictured Free Anti-Tarnish Silver Polishing Cloth ships from Hongkong via USPS First-Class Package International Service with Tracking Number