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Crystal Opal and Opal Physical Properties


Opal and Crystal Opal Physical Properties


Physical Properties

Tenacity
Not Available   
BrittleWalter Schumann   

Solubility
Not Available   
hot salt water   

Durability
Not Available   
Not Available   

Specific Gravity
1.97-2.22   
1.98-2.25   

Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle   

Cleavage
Not Available   
None   

Mohs Hardness
5.5-6.5   
5-6.5   

Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.   
SiO2 · nH2O   

Optical Properties >>
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Crystal Opal and Opal Chemical Formula

While comparing Crystal Opal and 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 Crystal Opal and Opal chemical formula.

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Crystal Opal and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Crystal Opal and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Crystal Opal and Opal Optical Properties during the identification of gemstone. Specific gravity of Crystal Opal is 1.98-2.25 whereas that of Opal is 1.98-2.25.

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