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Black Opal
Black Opal

Violane
Violane



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Black Opal
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Violane

Black Opal and Violane Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.
 
-
-
-
3.22-3.40
Conchoidal
Perfect
5-6
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)

Black Opal and Violane Chemical Formula

While comparing Black Opal and Violane 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 Violane chemical formula.

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Black Opal and Violane Specific Gravity

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