Covellite and Lazurite Physical Properties
Tenacity
Flexible
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
2.75
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect on {0001}
Imperfect on {110}
Mohs Hardness
Not Available
5.5
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Covellite and Lazurite Chemical Formula
While comparing Covellite and Lazurite 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 Lazurite chemical formula.
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Covellite and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Covellite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Covellite is 2.75 whereas that of Lazurite is 2.75.