Cordierite and Axinite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.57-2.66
  
3.26-3.36
  
Fracture
Subconchoidal, Conchoidal, Brittle
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Fair on {100}, poor on {001} and {010}
  
Good on {100}
  
Mohs Hardness
7-7.5
  
6.5-7
  
Chemical Composition
Mg2Al4Si5O18
  
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references
  
Cordierite and Axinite Chemical Formula
While comparing Cordierite and Axinite 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 Axinite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Axinite- (Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Cordierite and Axinite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Axinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Axinite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.26-3.36 whereas that of Axinite is 3.26-3.36.