Anorthite and Realgar Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.77
  
3.56
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
(e.g. graphite).
  
Cleavage
Perfect [001] good [010] poor [110]
  
{010} Good
  
Mohs Hardness
6-6.5
  
Not Available
  
Chemical Composition
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
  
AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Anorthite and Realgar Chemical Formula
While comparing Anorthite and Realgar 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 Anorthite and Realgar chemical formula.
- Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
Anorthite and Realgar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Anorthite and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Realgar Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 3.56 whereas that of Realgar is 3.56.