Covellite and Opal Physical Properties
Tenacity
Flexible
BrittleWalter Schumann
Solubility
Not Available
hot salt water
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
1.98-2.25
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Cleavage
Perfect on {0001}
None
Mohs Hardness
Not Available
5-6.5
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO2 · nH2O
Covellite and Opal Chemical Formula
While comparing Covellite and 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 Opal chemical formula.
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Opal- SiO2 · nH2O
Covellite and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Covellite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Opal Optical Properties during the identification of gemstone. Specific gravity of Covellite is 1.98-2.25 whereas that of Opal is 1.98-2.25.