Dumortierite and Covellite Physical Properties
Tenacity
Not Available
Flexible
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
4.6-4.76
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Perfect on {0001}
Mohs Hardness
7-8.5
Not Available
Chemical Composition
AlAl6O3BSi3O18
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Dumortierite and Covellite Chemical Formula
While comparing Dumortierite and Covellite 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 Dumortierite and Covellite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Dumortierite and Covellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.