Sellaite and Sodalite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.14-3.16
  
2.15-2.40
  
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
Perfect on {010} and {110}
  
Poor on {110}
  
Mohs Hardness
5-5.5
  
5-6
  
Chemical Composition
MgF 2Ulrich Henn and Claudio C.
  
Na8Al6Si6O24Cl2
  
Sellaite and Sodalite Chemical Formula
While comparing Sellaite and Sodalite 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 Sellaite and Sodalite chemical formula.
- Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Sellaite and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sellaite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sellaite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Sellaite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.