2.5 ct. Australian Crystal Opal

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Overview Specs Documentation This gorgeous crystal opal is from Lightning Ridge, Australia. A loose stone can be great for collectors, or to make a beautiful piece of jewelry! 2.5c t. Crystal Opal Mined in Lightning Ridge, Australia. 10mm x 12mm x 3.4mm 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