Onyx and Tantalite Physical Properties

Onyx

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

2.55-2.705.2

1 7.18

1.5 Fracture

Not Available

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Indiscernible

Good in one direction

1.7 Mohs Hardness

6.5-76-6.5

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Tantalite Chemical Formula

While comparing Onyx 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 Onyx and Tantalite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

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Onyx and Tantalite Specific Gravity

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