Tanzanite and Corundum Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
insoluble
  
Durability
Hard
  
Not Available
  
Specific Gravity
3.35
  
3.90-4.05
  
Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
  
Uneven, Uneven, Gems, Difficult, Fibrous
  
Cleavage
Perfect {010}, imperfect {100}
  
None – parting in 3 directions
  
Mohs Hardness
6.5-7
  
9
  
Chemical Composition
Ca2Al3(SiO4)3(OH)
  
Al 2O 3Arthur Thomas , Gemstones (2009)
  
Tanzanite and Corundum Chemical Formula
While comparing Tanzanite and Corundum 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 Tanzanite and Corundum chemical formula.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Tanzanite and Corundum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tanzanite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.