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Black Opal and Hollandite Physical Properties


Hollandite and Black Opal Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.97-2.22   
5.05   

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

Cleavage
Not Available   
Distinct / Good, Prismatic   

Mohs Hardness
6-6.5   
4-6   

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

Optical Properties >>
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Black Opal and Hollandite Chemical Formula

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

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Black Opal and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 5.05 whereas that of Hollandite is 5.05.

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