Sapphire and Tanzanite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Not Available
  
Durability
Not Available
  
Hard
  
Specific Gravity
3.95-4.03
  
3.35
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
  
Cleavage
None, but may exhibit parting
  
Perfect {010}, imperfect {100}
  
Mohs Hardness
9
  
6.5-7
  
Chemical Composition
Al 2 O 3
  
Ca2Al3(SiO4)3(OH)
  
Sapphire and Tanzanite Chemical Formula
While comparing Sapphire and Tanzanite 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 Tanzanite chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
Sapphire and Tanzanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 3.35 whereas that of Tanzanite is 3.35.
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