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Sillimanite and Verdite Physical Properties


Verdite and Sillimanite Physical Properties


Physical Properties

Tenacity
Tough   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.20-3.26   
2.80-3.0   

Fracture
Splintery   
Not Available   

Cleavage
{010} perfect   
{110} Good   

Mohs Hardness
6-7.5   
3   

Chemical Composition
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)   
NaFeS2•2(H2O)   

Optical Properties >>
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Sillimanite and Verdite Chemical Formula

While comparing Sillimanite and Verdite 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 Verdite chemical formula.

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Sillimanite and Verdite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Verdite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Verdite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.80-3.0 whereas that of Verdite is 2.80-3.0.

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