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Diaspore and Common Opal Physical Properties


Common Opal and Diaspore Physical Properties


Physical Properties

Tenacity
Very brittle   
Not Available   

Solubility
insoluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.30-3.40   
1.98-2.50   

Fracture
Conchoidal, Brittle, Conchoidal   
Conchoidal, Conchoidal, Gemstones of the world (2001)   

Cleavage
{010} perfect, {110} distinct, {100} in traces   
Not Available   

Mohs Hardness
6.5-7   
5.5-6.5   

Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references   
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)   

Optical Properties >>
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Diaspore and Common Opal Chemical Formula

While comparing Diaspore 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 Diaspore and Common Opal chemical formula.

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Diaspore and Common Opal Specific Gravity

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

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