Covellite and Staurolite Physical Properties
Tenacity
Flexible
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
3.7-3.8
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect on {0001}
Distinct on {010}
Mohs Hardness
Not Available
7-7.5
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Covellite and Staurolite Chemical Formula
While comparing Covellite and Staurolite 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 Staurolite chemical formula.
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Covellite and Staurolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Covellite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Covellite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.