Cordierite and Childrenite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.57-2.66
  
3.06-3.25
  
Fracture
Subconchoidal, Conchoidal, Brittle
  
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
  
Cleavage
Fair on {100}, poor on {001} and {010}
  
Poor/indistinct on {100}
  
Mohs Hardness
7-7.5
  
4.5-5
  
Chemical Composition
Mg2Al4Si5O18
  
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
  
Cordierite and Childrenite Chemical Formula
While comparing Cordierite and Childrenite 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 Childrenite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Cordierite and Childrenite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Childrenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Childrenite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.06-3.25 whereas that of Childrenite is 3.06-3.25.