Black Opal and Chalcopyrite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
4.1-4.3
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Brittle, Metallic
Cleavage
Not Available
Indistinct on {011}
Mohs Hardness
6-6.5
3.5-4
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
CuFeS 2Anthony et al , Handbook of mineralogy (2001)
Black Opal and Chalcopyrite Chemical Formula
While comparing Black Opal and Chalcopyrite 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 Chalcopyrite chemical formula.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Chalcopyrite- CuFeS 2Anthony et al , Handbook of mineralogy (2001)
Black Opal and Chalcopyrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Black Opal and Chalcopyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Chalcopyrite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 4.1-4.3 whereas that of Chalcopyrite is 4.1-4.3.