Gypsum and Sodalite Physical Properties
Tenacity
Flexible
  
Brittle
  
Solubility
Soluble
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.20-2.40
  
2.15-2.40
  
Fracture
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
Perfect on {010}, distinct on {100}
  
Poor on {110}
  
Mohs Hardness
2
  
5-6
  
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
  
Na8Al6Si6O24Cl2
  
Gypsum and Sodalite Chemical Formula
While comparing Gypsum 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 Gypsum and Sodalite chemical formula.
- Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Gypsum and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gypsum and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gypsum and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Gypsum is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.