Cordierite and Halite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Water-soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.57-2.66
  
2.17
  
Fracture
Subconchoidal, Conchoidal, Brittle
  
Conchoidal, Brittle, Metallic
  
Cleavage
Fair on {100}, poor on {001} and {010}
  
Perfect {001}, three directions cubic
  
Mohs Hardness
7-7.5
  
2.0-2.5
  
Chemical Composition
Mg2Al4Si5O18
  
NaCl
  
Cordierite and Halite Chemical Formula
While comparing Cordierite and Halite 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 Cordierite and Halite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Halite- NaCl
Cordierite and Halite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Halite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Halite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.17 whereas that of Halite is 2.17.