Ettringite and Covellite Physical Properties
Tenacity
Not Available
Flexible
Solubility
Partially soluble in water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.77
4.6-4.76
Fracture
Not Available
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
Perfect on {10 1 0}
Perfect on {0001}
Mohs Hardness
2-2.5
Not Available
Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ettringite and Covellite Chemical Formula
While comparing Ettringite 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 Ettringite and Covellite chemical formula.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ettringite and Covellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ettringite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.