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Staurolite and Faustite Physical Properties


Faustite 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   
2.9   

Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal   

Cleavage
Distinct on {010}   
{???} Indistinct   

Mohs Hardness
7-7.5   
4.5   

Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Staurolite and Faustite Chemical Formula

While comparing Staurolite and Faustite 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 Faustite chemical formula.

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Staurolite and Faustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.9 whereas that of Faustite is 2.9.

Brown Gemstones

Brown Gemstones


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