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Staurolite and Andradite Physical Properties


Andradite and Staurolite Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.7-3.8   
3.70-4.10   

Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
Distinct on {010}   
none   

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.   
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)   

Optical Properties >>
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Staurolite and Andradite Chemical Formula

While comparing Staurolite and Andradite 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 Andradite chemical formula.

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Staurolite and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.

Brown Gemstones

Brown Gemstones


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