Spinel and Sodalite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
none
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.64-3.66
  
2.15-2.40
  
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
None, but may exhibit slight parting
  
Poor on {110}
  
Mohs Hardness
8
  
5-6
  
Chemical Composition
MgAl2O4
  
Na8Al6Si6O24Cl2
  
Spinel and Sodalite Chemical Formula
While comparing Spinel 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 Spinel and Sodalite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Spinel and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.