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Rubellite and Staurolite Physical Properties


Staurolite and Rubellite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.01-3.06   
3.7-3.8   

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

Cleavage
Not Available   
Distinct on {010}   

Mohs Hardness
7-7.5   
7-7.5   

Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.   
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   

Optical Properties >>
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Rubellite and Staurolite Chemical Formula

While comparing Rubellite 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 Rubellite and Staurolite chemical formula.

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Rubellite and Staurolite Specific Gravity

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

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