Spinel and Gahnite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
none
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.64-3.66
  
4.00-4.62
  
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Conchoidal, Uneven
  
Cleavage
None, but may exhibit slight parting
  
Indistinct parting on [111]
  
Mohs Hardness
8
  
7.5-8
  
Chemical Composition
MgAl2O4
  
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Spinel and Gahnite Chemical Formula
While comparing Spinel and Gahnite 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 Gahnite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Spinel and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.