Tantalite and Alexandrite Physical Properties

Tantalite

Alexandrite

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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

5.23.69-3.81

1 7.18

1.5 Fracture

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

Good in one direction

1,1 ; 3,2.

1.7 Mohs Hardness

6-6.58.5

2 10

1.8 Chemical Composition

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

BeAl ₂ O ₄

Tantalite and Alexandrite Chemical Formula

While comparing Tantalite and Alexandrite 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 Alexandrite chemical formula.

Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Tantalite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tantalite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tantalite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Tantalite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.