Sillimanite and Tantalite Physical Properties

Sillimanite

Tantalite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.26

5.2

1.5 Fracture

Splintery

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{010} perfect

Good in one direction

1.7 Mohs Hardness

6-7.5

6-6.5

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

Sillimanite and Tantalite Chemical Formula

While comparing Sillimanite and Tantalite 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 Sillimanite and Tantalite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

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Sillimanite Vs Starlite

Sillimanite Vs Tanzanite

Sillimanite and Tantalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Tantalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Tantalite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 5.2 whereas that of Tantalite is 5.2.