Realgar and Cordierite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.56
  
2.57-2.66
  
Fracture
(e.g. graphite).
  
Subconchoidal, Conchoidal, Brittle
  
Cleavage
{010} Good
  
Fair on {100}, poor on {001} and {010}
  
Mohs Hardness
Not Available
  
7-7.5
  
Chemical Composition
AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Mg2Al4Si5O18
  
Realgar and Cordierite Chemical Formula
While comparing Realgar and Cordierite 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 Realgar and Cordierite chemical formula.
- Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Cordierite- Mg2Al4Si5O18
Realgar and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Realgar and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Realgar and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Realgar is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.