Nuummite and Elbaite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.18-3.37
  
2.90-3.10
  
Fracture
Conchoidal
  
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Cleavage
Perfect on 210
  
Poor/indistinct on {1120} and {1011}
  
Mohs Hardness
5.5-6
  
7
  
Chemical Composition
Not Available
  
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
  
Nuummite and Elbaite Chemical Formula
While comparing Nuummite and Elbaite 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 Elbaite chemical formula.
>- Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Nuummite and Elbaite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Nuummite and Elbaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nuummite and Elbaite Optical Properties during the identification of gemstone. Specific gravity of Nuummite is 2.90-3.10 whereas that of Elbaite is 2.90-3.10.