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Zircon and Sillimanite Physical Properties


Sillimanite and Zircon Physical Properties


Physical Properties

Tenacity
Brittle   
Tough   

Solubility
insoluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.93-4.73   
3.20-3.26   

Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)   
Splintery   

Cleavage
{110} and {111}   
{010} perfect   

Mohs Hardness
7.5   
6-7.5   

Chemical Composition
ZrSiO4   
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Zircon and Sillimanite Chemical Formula

While comparing Zircon and Sillimanite 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 Zircon and Sillimanite chemical formula.

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Zircon and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zircon and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zircon and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Zircon is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.

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