Covellite and Apophyllite KF Physical Properties
Tenacity
Flexible
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
2.33-2.37
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Uneven, Brittle, Uneven, Brittle, Uneven
Cleavage
Perfect on {0001}
Perfect on {001}, imperfect on {110}
Mohs Hardness
Not Available
4.5-5
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
Covellite and Apophyllite KF Chemical Formula
While comparing Covellite and Apophyllite KF 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 Apophyllite KF chemical formula.
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Covellite and Apophyllite KF Specific Gravity
Another important criteria for qualitative analysis of gemstones is Covellite and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Covellite is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.