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Black Opal and Dumortierite Physical Properties


Dumortierite 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   
3.26-3.41   

Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references   

Cleavage
Not Available   
Distinct on {100}, poor on {110}; parting on {001}   

Mohs Hardness
6-6.5   
7-8.5   

Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.   
AlAl6O3BSi3O18   

Optical Properties >>
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Black Opal and Dumortierite Chemical Formula

While comparing Black Opal and Dumortierite 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 Dumortierite chemical formula.

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Black Opal and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.

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