Product Details
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This gorgeous Australian black opal changes colors right before your eyes. A loose stone can be great for collectors, or to make a beautiful piece of jewelry!
- 0.79ct Black opal
- Mined in Lightning Ridge, Australia
- 5.3mm x 7.2mm x 3.4mm
BIRTHSTONES & ANNIVERSARIES
Opal is an October birthstone and the 14 year wedding anniversary stone.
- MINERAL: Hydrated Silica
- CHEMISTRY: SiO2nH2O
- 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
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