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