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Hollandite and Black Opal Physical Properties


Black Opal and Hollandite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
5.05   
1.97-2.22   

Fracture
Brittle, Metallic   
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
Distinct / Good, Prismatic   
Not Available   

Mohs Hardness
4-6   
6-6.5   

Chemical Composition
Ba(Mn++++,Mn++)8O16   
SiO 2 + H 2OUlrich Henn and Claudio C.   

Optical Properties >>
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Hollandite and Black Opal Chemical Formula

While comparing Hollandite 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 Hollandite and Black Opal chemical formula.

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Hollandite and Black Opal Specific Gravity

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

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