Topaz and Covellite Physical Properties
Tenacity
Not Available
Flexible
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.49-3.57
4.6-4.76
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
[001] Perfect
Perfect on {0001}
Mohs Hardness
8
Not Available
Chemical Composition
Al2SiO4(F,OH)2
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Topaz and Covellite Chemical Formula
While comparing Topaz 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 Topaz and Covellite chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Topaz and Covellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Covellite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 4.6-4.76 whereas that of Covellite is 4.6-4.76.