Onyx and Phosgenite Physical Properties
Tenacity
Not Available
Sectile
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
6.13
Fracture
Not Available
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).
Cleavage
Indiscernible
Distinct on {001} and {110}, indistinct on {100}
Chemical Composition
SiO2
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Onyx and Phosgenite Chemical Formula
While comparing Onyx and Phosgenite 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 Phosgenite chemical formula.
- Chemical formula of Onyx- SiO2
- Chemical formula of Phosgenite- Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Onyx and Phosgenite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Onyx and Phosgenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Phosgenite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 6.13 whereas that of Phosgenite is 6.13.