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Poldervaartite and Black Opal Physical Properties


Black Opal and Poldervaartite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.91   
1.97-2.22   

Fracture
Handbook of mineralogy (2001)   
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
None   
Not Available   

Mohs Hardness
Not Available   
6-6.5   

Chemical Composition
(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)   
SiO 2 + H 2OUlrich Henn and Claudio C.   

Optical Properties >>
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Poldervaartite and Black Opal Chemical Formula

While comparing Poldervaartite and Black 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 Poldervaartite and Black Opal chemical formula.

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Poldervaartite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poldervaartite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poldervaartite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Poldervaartite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.

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