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Opal and Poudretteite Physical Properties


Poudretteite and Opal Physical Properties


Physical Properties

Tenacity
BrittleWalter Schumann   
Brittle   

Solubility
hot salt water   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.98-2.25   
2.51-2.53   

Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle   
Conchoidal, Splintery   

Cleavage
None   
None   

Mohs Hardness
5-6.5   
5   

Chemical Composition
SiO2 · nH2O   
KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Opal and Poudretteite Chemical Formula

While comparing Opal and Poudretteite 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 Poudretteite chemical formula.

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Opal and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.

Semi Precious

Semi Precious


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