Sapphire and Boracite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
insoluble
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
2.95-2.96
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Cleavage
None, but may exhibit parting
  
None
  
Mohs Hardness
9
  
7-7.5
  
Chemical Composition
Al 2 O 3
  
Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Sapphire and Boracite Chemical Formula
While comparing Sapphire and Boracite 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 Boracite chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Boracite- Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Sapphire and Boracite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Boracite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Boracite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.95-2.96 whereas that of Boracite is 2.95-2.96.
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