Dumortierite and Langbeinite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Slowly dissolves in water
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.26-3.41
  
Not Available
  
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
Conchoidal, Brittle
  
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
  
None
  
Mohs Hardness
7-8.5
  
3.5-4
  
Chemical Composition
AlAl6O3BSi3O18
  
Not Available
  
Dumortierite and Langbeinite Chemical Formula
While comparing Dumortierite and Langbeinite 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 Langbeinite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
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Dumortierite and Langbeinite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Langbeinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Langbeinite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is Not Available whereas that of Langbeinite is Not Available.