Ruby and Realgar Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
3.56
  
Fracture
Conchoidal
  
(e.g. graphite).
  
Cleavage
No true cleavage
  
{010} Good
  
Mohs Hardness
9
  
Not Available
  
Chemical Composition
Al 2 O 3
  
AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Ruby and Realgar Chemical Formula
While comparing Ruby 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 Ruby and Realgar chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
Ruby and Realgar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Realgar Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.56 whereas that of Realgar is 3.56.
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