ltem description from the seller
Material: Primary - Purity:925 Finish:Polished Stone Type_1:Onyx Stone Color_1:Black Stone Quantity_1:1 Band Width:5 to 13.50 mm (tapered) Feature:Solid Material: Primary:Sterling Silver Completeness:Complete (all stones included) Sizeable:No Stone Shape_1:Oval Stone Size_1:13 x 10 mm Product Type:Jewelry Jewelry Type:Rings Sold By Unit:Each Texture:Textured Material: Primary - Color:White Ring Type:Rings with Stones Ring Top Length:16.69 mm Ring Top Width:13.44 mm Feature 2:Open Back Stone Creation Method_1:Synthetic