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Hollandite and Opal Physical Properties


Opal and Hollandite Physical Properties


Physical Properties

Tenacity
Not Available   
BrittleWalter Schumann   

Solubility
Not Available   
hot salt water   

Durability
Not Available   
Not Available   

Specific Gravity
5.05   
1.98-2.25   

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

Cleavage
Distinct / Good, Prismatic   
None   

Mohs Hardness
4-6   
5-6.5   

Chemical Composition
Ba(Mn++++,Mn++)8O16   
SiO2 · nH2O   

Optical Properties >>
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Hollandite and Opal Chemical Formula

While comparing Hollandite and 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 Opal chemical formula.

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Hollandite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Opal Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 1.98-2.25 whereas that of Opal is 1.98-2.25.

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Grey Gemstones


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