Spinel and Chromite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
none
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.64-3.66
  
4.5-4.8
  
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Uneven
  
Cleavage
None, but may exhibit slight parting
  
None, parting may develop along {111}
  
Mohs Hardness
8
  
5.5
  
Chemical Composition
MgAl2O4
  
Fe++Cr2O4
  
Spinel and Chromite Chemical Formula
While comparing Spinel and Chromite 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 Chromite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Chromite- Fe++Cr2O4
Spinel and Chromite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Chromite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 4.5-4.8 whereas that of Chromite is 4.5-4.8.