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Realgar and Opal Physical Properties


Opal and Realgar Physical Properties


Physical Properties

Tenacity
Not Available   
BrittleWalter Schumann   

Solubility
Not Available   
hot salt water   

Durability
Not Available   
Not Available   

Specific Gravity
3.56   
1.98-2.25   

Fracture
(e.g. graphite).   
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle   

Cleavage
{010} Good   
None   

Mohs Hardness
Not Available   
5-6.5   

Chemical Composition
AsSMichael O’Donoghue , Gems, Sixth Edition (2006)   
SiO2 · nH2O   

Optical Properties >>
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Realgar and Opal Chemical Formula

While comparing Realgar 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 Realgar and Opal chemical formula.

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Realgar and Opal Specific Gravity

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

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Red Gemstones


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