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Precious Opal and Austinite Physical Properties


Austinite and Precious Opal Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Easily soluble in cold dilute HCl   

Durability
Not Available   
Not Available   

Specific Gravity
1.98-2.25   
4.12   

Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references   
Brittle, Uneven, Brittle, Uneven   

Cleavage
Not Available   
Good in two directions parallel to the prism faces {110}   

Mohs Hardness
5-6.5   
4-4.5   

Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)   
CaZn(AsO4)(OH)   

Optical Properties >>
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Precious Opal and Austinite Chemical Formula

While comparing Precious Opal and Austinite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Precious Opal and Austinite chemical formula.

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Precious Opal and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Austinite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 4.12 whereas that of Austinite is 4.12.

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