Umbalite and Nuummite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.62-4.33
  
3.18-3.37
  
Fracture
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
  
Conchoidal
  
Cleavage
Not Available
  
Perfect on 210
  
Mohs Hardness
7-7.5
  
5.5-6
  
Chemical Composition
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
  
Not Available
  
Umbalite and Nuummite Chemical Formula
While comparing Umbalite and Nuummite 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 Umbalite and Nuummite chemical formula.
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
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Umbalite and Nuummite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Umbalite and Nuummite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Umbalite and Nuummite Optical Properties during the identification of gemstone. Specific gravity of Umbalite is 3.18-3.37 whereas that of Nuummite is 3.18-3.37.