Gorgeous Vintage Inspired Australian Opal Ring ►Made of 925 solid sterling silver with rhodium finish ►Average band width: 2 mmCenter Stone: OpalShape: OvalCut: Cabochon Gem size: 7 x 5 mmCarat Weight: 1.1 ct. (approx.)Gemstone Creation: 100% Natural Hardness: 6.5 (Mohs scale)Origin: Australia ►Your sterling silver ring will not turn green itself and will not cause your skin to turn green.►Vintage inspired ►True to size ✓ 100% Nickel-Free✓ Hypoallergenic✓ Comfort Fit✓ Free Ring Box✓ Free USA Shipping