Covellite and Black Opal Physical Properties
Tenacity
Flexible
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
1.97-2.22
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on {0001}
Not Available
Mohs Hardness
Not Available
6-6.5
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO 2 + H 2OUlrich Henn and Claudio C.
Covellite and Black Opal Chemical Formula
While comparing Covellite and Black Opal 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 Covellite and Black Opal chemical formula.
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Covellite and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Covellite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Covellite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.