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Dumortierite and Hollandite Physical Properties


Hollandite and Dumortierite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.26-3.41   
5.05   

Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references   
Brittle, Metallic   

Cleavage
Distinct on {100}, poor on {110}; parting on {001}   
Distinct / Good, Prismatic   

Mohs Hardness
7-8.5   
4-6   

Chemical Composition
AlAl6O3BSi3O18   
Ba(Mn++++,Mn++)8O16   

Optical Properties >>
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Dumortierite and Hollandite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Hollandite chemical formula.

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Dumortierite and Hollandite Specific Gravity

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

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