.97 ct. Australian Black Opal

RockShop Verified independent store

→

Overview Specs Documentation This colorful black opal is a beautiful blue color, that radiates green and orange. A loose stone can be great for collectors, or to make a beautiful p iece of jewelry! .96ct black opal Mined in Lightning Ridge, Australia. 6.7mm x 7.6mm x 3.3mm BIRTHSTONES & ANNIVERSARIES Opal is an October birthstone and the 14 year wedding anniversary stone. MINERAL: Hydrated Silica CHEMISTRY: SiO2•nH2O COLOR: All colors REFRACTIVE INDEX: 1.37-1.47 BIREFRINGENCE: None SPECIFIC GRAVITY: 2.15 (+0.08, -0.90) MOHS HARDNESS: 5 to 6.5 If you need additional information regarding any of our gems or stones please contact us at: [email protected] Show more