Dumortierite and Hardystonite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.26-3.41
  
3.396-3.443
  
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
Brittle, Metallic
  
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
  
[001] good, [100] and [110] fair
  
Mohs Hardness
7-8.5
  
3-4
  
Chemical Composition
AlAl6O3BSi3O18
  
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
  
Dumortierite and Hardystonite Chemical Formula
While comparing Dumortierite and Hardystonite 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 Dumortierite and Hardystonite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Dumortierite and Hardystonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.