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Sillimanite and Chalcedony Physical Properties


Chalcedony and Sillimanite Physical Properties


Physical Properties

Tenacity
Tough   
Not Available   

Solubility
Not Available   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.20-3.26   
2.55-2.70   

Fracture
Splintery   
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann   

Cleavage
{010} perfect   
Absent   

Mohs Hardness
6-7.5   
6.5-7   

Chemical Composition
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)   
SiO2   

Optical Properties >>
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Sillimanite and Chalcedony Chemical Formula

While comparing Sillimanite and Chalcedony 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 Chalcedony chemical formula.

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Sillimanite and Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.

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