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Sapphire and Staurolite Physical Properties


Staurolite and Sapphire Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
insoluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.03   
3.7-3.8   

Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
None, but may exhibit parting   
Distinct on {010}   

Mohs Hardness
9   
7-7.5   

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

Optical Properties >>
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Sapphire and Staurolite Chemical Formula

While comparing Sapphire 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 Sapphire and Staurolite chemical formula.

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Sapphire and Staurolite Specific Gravity

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

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