Sodalite and Foitite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.15-2.40
  
3.17
  
Fracture
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Handbook of mineralogy (2001)
  
Cleavage
Poor on {110}
  
None
  
Mohs Hardness
5-6
  
7
  
Chemical Composition
Na8Al6Si6O24Cl2
  
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
  
Sodalite and Foitite Chemical Formula
While comparing Sodalite and Foitite 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 Sodalite and Foitite chemical formula.
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
- Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Sodalite and Foitite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sodalite and Foitite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sodalite and Foitite Optical Properties during the identification of gemstone. Specific gravity of Sodalite is 3.17 whereas that of Foitite is 3.17.