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Periclase and Onyx Physical Properties


Onyx and Periclase Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.7-3.9   
2.55-2.70   

Fracture
Conchoidal, Brittle   
Not Available   

Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}   
Indiscernible   

Mohs Hardness
5.5-6   
6.5-7   

Chemical Composition
MgOMichael O’Donoghue , Gems, Sixth Edition (2006)   
SiO2   

Optical Properties >>
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Periclase and Onyx Chemical Formula

While comparing Periclase and Onyx 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 Periclase and Onyx chemical formula.

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Periclase and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Periclase and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Periclase and Onyx Optical Properties during the identification of gemstone. Specific gravity of Periclase is 2.55-2.70 whereas that of Onyx is 2.55-2.70.

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