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Pyrophyllite and Staurolite Physical Properties


Staurolite and Pyrophyllite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.65-2.90   
3.7-3.8   

Fracture
Gemstones (2009), Flexible Flexible fragments.   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
{001} Perfect   
Distinct on {010}   

Mohs Hardness
Not Available   
7-7.5   

Chemical Composition
Al 2Si 4O 10(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   

Optical Properties >>
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Pyrophyllite and Staurolite Chemical Formula

While comparing Pyrophyllite and Staurolite 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 Pyrophyllite and Staurolite chemical formula.

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Pyrophyllite and Staurolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.

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