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Zircon
Zircon

Sillimanite
Sillimanite



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Zircon
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Sillimanite

Zircon and Sillimanite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
insoluble
-
3.93-4.73
Conchoidal, Uneven
{110} and {111}
7.5
ZrSiO4
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

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 Vs Sillimanite during the identification of gemstone. Specific gravity of Zircon is whereas that of Sillimanite is .