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Jet
Jet

Sillimanite
Sillimanite



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Jet
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Sillimanite

Jet and Sillimanite Physical Properties

Jet
Jet
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.19-1.35
ConchoidalWalter Schumann
None
2.5-4
C
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Jet and Sillimanite Chemical Formula

While comparing Jet 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 Jet and Sillimanite chemical formula.

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Jet and Sillimanite Specific Gravity

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