Sapphire and Emerald Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Not Available
  
Durability
Not Available
  
Hard
  
Specific Gravity
3.95-4.03
  
2.67-2.78
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
None, but may exhibit parting
  
Imperfect on the [0001]
  
Mohs Hardness
9
  
7.5-8
  
Chemical Composition
Al 2 O 3
  
Be3Al2SiO6
  
Sapphire and Emerald Chemical Formula
While comparing Sapphire and Emerald 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 Sapphire and Emerald chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Emerald- Be3Al2SiO6
Sapphire and Emerald Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Emerald Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.67-2.78 whereas that of Emerald is 2.67-2.78.
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