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Black Opal
Black Opal

Cuprite
Cuprite



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Black Opal
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Cuprite

Black Opal and Cuprite 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.
 
Brittle
-
-
5.85-6.15
Conchoidal
Fair in four directions forming octahedrons
3.5-4
Cu 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Black Opal and Cuprite Chemical Formula

While comparing Black Opal and Cuprite 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 Cuprite chemical formula.

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Black Opal and Cuprite Specific Gravity

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