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Onyx and Blue John Physical Properties


Blue John 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   
3.00-3.25   

Fracture
Not Available   
Not Available   

Cleavage
Indiscernible   
Not Available   

Mohs Hardness
6.5-7   
Not Available   

Chemical Composition
SiO2   
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Onyx and Blue John Chemical Formula

While comparing Onyx and Blue John 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 Blue John chemical formula.

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Onyx and Blue John Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Blue John Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.00-3.25 whereas that of Blue John is 3.00-3.25.

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