Andalusite and Covellite Physical Properties
Tenacity
Not Available
Flexible
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.05-3.21
4.6-4.76
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
Good on {110}, poor on {100}
Perfect on {0001}
Mohs Hardness
7.5
Not Available
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Andalusite and Covellite Chemical Formula
While comparing Andalusite 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 Andalusite and Covellite chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Andalusite and Covellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.