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Staurolite and Powellite Physical Properties


Powellite 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   
4.23   

Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal   

Cleavage
Distinct on {010}   
{111} Distinct   

Mohs Hardness
7-7.5   
3.5-4   

Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   
CaMoO 4Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Staurolite and Powellite Chemical Formula

While comparing Staurolite and Powellite 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 Powellite chemical formula.

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Staurolite and Powellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Powellite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 4.23 whereas that of Powellite is 4.23.

Brown Gemstones

Brown Gemstones


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