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Opal and Realgar Physical Properties


Realgar and Opal Physical Properties


Physical Properties

Tenacity
BrittleWalter Schumann   
Not Available   

Solubility
hot salt water   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.98-2.25   
3.56   

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

Cleavage
None   
{010} Good   

Mohs Hardness
5-6.5   
Not Available   

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

Optical Properties >>
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Opal and Realgar Chemical Formula

While comparing Opal and Realgar 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 Opal and Realgar chemical formula.

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Opal and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Realgar Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.56 whereas that of Realgar is 3.56.

Semi Precious

Semi Precious


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