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Heliotrope
Heliotrope

Sillimanite
Sillimanite



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Heliotrope
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Sillimanite

Heliotrope and Sillimanite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.61
-
None
6.5-7
SiO2
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Heliotrope and Sillimanite Chemical Formula

While comparing Heliotrope 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 Heliotrope and Sillimanite chemical formula.

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Heliotrope and Sillimanite Specific Gravity

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