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Staurolite and Dallasite Physical Properties


Dallasite and Staurolite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.7-3.8   
2.58-2.91   

Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
Not Available   

Cleavage
Distinct on {010}   
Not Available   

Mohs Hardness
7-7.5   
6.5-7   

Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   
Not Available   

Optical Properties >>
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Staurolite and Dallasite Chemical Formula

While comparing Staurolite and Dallasite 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 Staurolite and Dallasite chemical formula.

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Staurolite and Dallasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Dallasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Dallasite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.58-2.91 whereas that of Dallasite is 2.58-2.91.

Brown Gemstones

Brown Gemstones


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