Spinel and Cordierite Iolite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
none
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.64-3.66
  
2.56-2.66
  
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
None, but may exhibit slight parting
  
Not Available
  
Mohs Hardness
8
  
7-7.5
  
Chemical Composition
MgAl2O4
  
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
  
Spinel and Cordierite Iolite Chemical Formula
While comparing Spinel and Cordierite Iolite 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 Cordierite Iolite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
Spinel and Cordierite Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.