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Chalcedony and Common Opal Physical Properties


Common Opal and Chalcedony Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Soluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.55-2.70   
1.98-2.50   

Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann   
Conchoidal, Conchoidal, Gemstones of the world (2001)   

Cleavage
Absent   
Not Available   

Mohs Hardness
6.5-7   
5.5-6.5   

Chemical Composition
SiO2   
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)   

Optical Properties >>
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Chalcedony and Common Opal Chemical Formula

While comparing Chalcedony and Common Opal 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 Chalcedony and Common Opal chemical formula.

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Chalcedony and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chalcedony and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.

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