Emerald and Realgar Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Hard
  
Not Available
  
Specific Gravity
2.67-2.78
  
3.56
  
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
(e.g. graphite).
  
Cleavage
Imperfect on the [0001]
  
{010} Good
  
Mohs Hardness
7.5-8
  
Not Available
  
Chemical Composition
Be3Al2SiO6
  
AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Emerald and Realgar Chemical Formula
While comparing Emerald 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 Emerald and Realgar chemical formula.
- Chemical formula of Emerald- Be3Al2SiO6
- Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
Emerald and Realgar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Emerald and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Emerald and Realgar Optical Properties during the identification of gemstone. Specific gravity of Emerald is 3.56 whereas that of Realgar is 3.56.
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