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Topaz and Austinite Physical Properties


Austinite and Topaz Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Easily soluble in cold dilute HCl   

Durability
Not Available   
Not Available   

Specific Gravity
3.49-3.57   
4.12   

Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle   
Brittle, Uneven, Brittle, Uneven   

Cleavage
[001] Perfect   
Good in two directions parallel to the prism faces {110}   

Mohs Hardness
8   
4-4.5   

Chemical Composition
Al2SiO4(F,OH)2   
CaZn(AsO4)(OH)   

Optical Properties >>
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Topaz and Austinite Chemical Formula

While comparing Topaz 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 Topaz and Austinite chemical formula.

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Topaz and Austinite Specific Gravity

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

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