Emerald and Bertrandite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Hard
  
Not Available
  
Specific Gravity
2.67-2.78
  
2.59-2.60
  
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Brittle, Metallic, Brittle, Metallic
  
Cleavage
Imperfect on the [0001]
  
{001} Perfect, {110} Distinct, {101} Distinct
  
Mohs Hardness
7.5-8
  
6-7
  
Chemical Composition
Be3Al2SiO6
  
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
  
Emerald and Bertrandite Chemical Formula
While comparing Emerald and Bertrandite 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 Bertrandite chemical formula.
- Chemical formula of Emerald- Be3Al2SiO6
- Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Emerald and Bertrandite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Emerald and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Emerald and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Emerald is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.
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