Pyrargyrite and Iolite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.85
  
2.6-2.7
  
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Brittle
  
Not Available
  
Cleavage
Distinct on {10 1 1}, imperfect on {01 1 2}
  
3,1
  
Mohs Hardness
2.5-3
  
7-7.5
  
Chemical Composition
Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Mg2Al4Si5O18
  
Pyrargyrite and Iolite Chemical Formula
While comparing Pyrargyrite and Iolite 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 Pyrargyrite and Iolite chemical formula.
- Chemical formula of Pyrargyrite- Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Iolite- Mg2Al4Si5O18
Pyrargyrite and Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyrargyrite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrargyrite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Pyrargyrite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.