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Calcite
Calcite

Sillimanite
Sillimanite



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Calcite
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Sillimanite

Calcite and Sillimanite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.67-2.73
Conchoidal
Perfect on [10 1 1] three directions with angle of 74° 55
3
CaCO 3Ulrich Henn and Claudio C.
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Calcite and Sillimanite Chemical Formula

While comparing Calcite 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 Calcite and Sillimanite chemical formula.

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Calcite and Sillimanite Specific Gravity

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