Phosgenite and Black Opal Physical Properties
Tenacity
Sectile
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
6.13
  
1.97-2.22
  
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).
  
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Distinct on {001} and {110}, indistinct on {100}
  
Not Available
  
Mohs Hardness
2-3
  
6-6.5
  
Chemical Composition
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
SiO 2 + H 2OUlrich Henn and Claudio C.
  
Phosgenite and Black Opal Chemical Formula
While comparing Phosgenite and Black Opal 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 Phosgenite and Black Opal chemical formula.
- Chemical formula of Phosgenite- Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Phosgenite and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phosgenite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phosgenite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Phosgenite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.