Wood Opal
Yellowish or brownish Opal as petrified wood.
| General Information | ||||||||||||
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| A variety or type of: | Common Opal, which is a variety of Opal | |||||||||||
| Other Names/Trade Names: | ||||||||||||
| Chemical Formula |
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| Physical Properties of Wood Opal | ||||||||||||
| Mohs Hardness | 5.5 to 6.5, Gemstones of the world (2001) | |||||||||||
| Specific Gravity | 1.98 to 2.50, Gemstones of the world (2001) | |||||||||||
| Tenacity | Brittle, Gemstones of the world (2001) | |||||||||||
| Cleavage Quality | None, Gemstones of the world (2001) | |||||||||||
| Optical Properties of Wood Opal | ||||||||||||
| Refractive Index | 1.37 to 1.52, Gemstones of the world (2001) | |||||||||||
| Colour | ||||||||||||
| Colour (General) | Yellowish, brownish, Gemstones of the world (2001) | |||||||||||
| Further Information | ||||||||||||
| Mineral information: | Wood Opal information at mindat.org | |||||||||||
| Significant Gem Localities | ||||||||||||
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