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Black Opal and Riebeckite Physical Properties


Riebeckite and Black Opal Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.97-2.22   
3.28-3.44   

Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   
Uneven, Splintery, Brittle   

Cleavage
Not Available   
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}   

Mohs Hardness
6-6.5   
5.0-6.0   

Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.   
Not Available   

Optical Properties >>
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Black Opal and Riebeckite Chemical Formula

While comparing Black Opal and Riebeckite 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 Riebeckite chemical formula.

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Black Opal and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.

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