Cordierite Iolite and Black Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.56-2.66
1.97-2.22
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
Not Available
Mohs Hardness
7-7.5
6-6.5
Chemical Composition
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
SiO 2 + H 2OUlrich Henn and Claudio C.
Cordierite Iolite and Black Opal Chemical Formula
While comparing Cordierite Iolite 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 Cordierite Iolite and Black Opal chemical formula.
- Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Cordierite Iolite and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite Iolite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite Iolite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Cordierite Iolite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.