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Sillimanite
Sillimanite

Staurolite
Staurolite



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Sillimanite
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Staurolite

Sillimanite and Staurolite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
-
-
3.7-3.8
Subconchoidal, Conchoidal
Distinct on {010}
7-7.5
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Sillimanite and Staurolite Chemical Formula

While comparing Sillimanite 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 Sillimanite and Staurolite chemical formula.

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Sillimanite and Staurolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite Vs Staurolite during the identification of gemstone. Specific gravity of Sillimanite is whereas that of Staurolite is .