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Lazurite and Austinite Physical Properties


Austinite and Lazurite Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Soluble   
Easily soluble in cold dilute HCl   

Durability
Not Available   
Not Available   

Specific Gravity
2.75   
4.12   

Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
Brittle, Uneven, Brittle, Uneven   

Cleavage
Imperfect on {110}   
Good in two directions parallel to the prism faces {110}   

Mohs Hardness
5.5   
4-4.5   

Chemical Composition
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.   
CaZn(AsO4)(OH)   

Optical Properties >>
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Lazurite and Austinite Chemical Formula

While comparing Lazurite 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 Lazurite and Austinite chemical formula.

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Lazurite and Austinite Specific Gravity

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

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