Onyx and Scheelite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
5.9-6.3
Fracture
Not Available
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Uneven
Cleavage
Indiscernible
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
6.5-7
4.5-5
Chemical Composition
SiO2
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Onyx and Scheelite Chemical Formula
While comparing Onyx and Scheelite 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 Onyx and Scheelite chemical formula.
- Chemical formula of Onyx- SiO2
- Chemical formula of Scheelite- CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Onyx and Scheelite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Onyx and Scheelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Scheelite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 5.9-6.3 whereas that of Scheelite is 5.9-6.3.