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Onyx and Tanzanite Physical Properties


Tanzanite and Onyx Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Hard   

Specific Gravity
2.55-2.70   
3.35   

Fracture
Not Available   
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)   

Cleavage
Indiscernible   
Perfect {010}, imperfect {100}   

Mohs Hardness
6.5-7   
6.5-7   

Chemical Composition
SiO2   
Ca2Al3(SiO4)3(OH)   

Optical Properties >>
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Onyx and Tanzanite Chemical Formula

While comparing Onyx and Tanzanite 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 Tanzanite chemical formula.

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Onyx and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.35 whereas that of Tanzanite is 3.35.

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