Covellite and Sillimanite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
3.20-3.26
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Splintery
Cleavage
Perfect on {0001}
{010} perfect
Mohs Hardness
Not Available
6-7.5
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Covellite and Sillimanite Chemical Formula
While comparing Covellite and Sillimanite 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 Sillimanite chemical formula.
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Covellite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Covellite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Covellite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.