Dumortierite and Phlogopite Physical Properties
Tenacity
Not Available
  
Tough
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.26-3.41
  
2.78-2.85
  
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
None, Uneven
  
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
  
Perfect basal (001)
  
Mohs Hardness
7-8.5
  
2-2.5
  
Chemical Composition
AlAl6O3BSi3O18
  
Not Available
  
Dumortierite and Phlogopite Chemical Formula
While comparing Dumortierite and Phlogopite 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 Phlogopite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
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Dumortierite and Phlogopite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Phlogopite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Phlogopite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 2.78-2.85 whereas that of Phlogopite is 2.78-2.85.