Sapphire and Bertrandite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
2.59-2.60
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Brittle, Metallic, Brittle, Metallic
  
Cleavage
None, but may exhibit parting
  
{001} Perfect, {110} Distinct, {101} Distinct
  
Mohs Hardness
9
  
6-7
  
Chemical Composition
Al 2 O 3
  
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
  
Sapphire and Bertrandite Chemical Formula
While comparing Sapphire 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 Sapphire and Bertrandite chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Sapphire and Bertrandite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.
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