Iolite and Tantalite Physical Properties

Iolite

Tantalite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.75.2

1 7.18

1.5 Fracture

Not Available

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

3,1

Good in one direction

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

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

Iolite and Tantalite Chemical Formula

While comparing Iolite 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 Iolite and Tantalite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

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Iolite and Tantalite Specific Gravity

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