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Staurolite and Grandidierite Physical Properties


Grandidierite 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   
2.85-3.00   

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

Cleavage
Distinct on {010}   
Perfect   

Mohs Hardness
7-7.5   
7.5   

Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.   

Optical Properties >>
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Staurolite and Grandidierite Chemical Formula

While comparing Staurolite and Grandidierite 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 Grandidierite chemical formula.

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Staurolite and Grandidierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.

Brown Gemstones

Brown Gemstones


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