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Tantalite
Tantalite

Sillimanite
Sillimanite



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Tantalite
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Sillimanite

Tantalite and Sillimanite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
5.2
Subconchoidal, Conchoidal
Good in one direction
6-6.5
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Tantalite and Sillimanite Chemical Formula

While comparing Tantalite 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 Tantalite and Sillimanite chemical formula.

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Tantalite and Sillimanite Specific Gravity

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