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Onyx and Faustite Physical Properties


Faustite and Onyx Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.55-2.70   
2.9   

Fracture
Not Available   
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal   

Cleavage
Indiscernible   
{???} Indistinct   

Mohs Hardness
6.5-7   
4.5   

Chemical Composition
SiO2   
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Onyx and Faustite Chemical Formula

While comparing Onyx and Faustite 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 Faustite chemical formula.

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Onyx and Faustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Faustite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.9 whereas that of Faustite is 2.9.

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