Riebeckite and Proustite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.28-3.44
  
5.51-5.64
  
Fracture
Uneven, Splintery, Brittle
  
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
  
Distinct on {10 1 1}
  
Mohs Hardness
5.0-6.0
  
2.5
  
Chemical Composition
Not Available
  
Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Riebeckite and Proustite Chemical Formula
While comparing Riebeckite and Proustite 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 Riebeckite and Proustite chemical formula.
>- Chemical formula of Proustite- Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Riebeckite and Proustite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Riebeckite and Proustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Proustite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 5.51-5.64 whereas that of Proustite is 5.51-5.64.