Pyrophyllite and Covellite Physical Properties
Tenacity
Not Available
Flexible
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65-2.90
4.6-4.76
Fracture
Gemstones (2009), Flexible Flexible fragments.
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
{001} Perfect
Perfect on {0001}
Mohs Hardness
Not Available
Not Available
Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pyrophyllite and Covellite Chemical Formula
While comparing Pyrophyllite 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 Pyrophyllite and Covellite chemical formula.
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pyrophyllite and Covellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.