Nuummite and Dumortierite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.18-3.37
  
3.26-3.41
  
Fracture
Conchoidal
  
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
Cleavage
Perfect on 210
  
Distinct on {100}, poor on {110}; parting on {001}
  
Mohs Hardness
5.5-6
  
7-8.5
  
Chemical Composition
Not Available
  
AlAl6O3BSi3O18
  
Nuummite and Dumortierite Chemical Formula
While comparing Nuummite and Dumortierite 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 Nuummite and Dumortierite chemical formula.
>- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Nuummite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Nuummite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nuummite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Nuummite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.