Calcite and Sodalite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Soluble
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.67-2.73
  
2.15-2.40
  
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
  
Poor on {110}
  
Mohs Hardness
3
  
5-6
  
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
  
Na8Al6Si6O24Cl2
  
Calcite and Sodalite Chemical Formula
While comparing Calcite 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 Calcite and Sodalite chemical formula.
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Calcite and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Calcite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.