Hercynite and Spinel Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.39
  
3.64-3.66
  
Fracture
ConchoidalGemdat.org, Uneven
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
  
None, but may exhibit slight parting
  
Mohs Hardness
7.5-8
  
8
  
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
  
MgAl2O4
  
Hercynite and Spinel Chemical Formula
While comparing Hercynite and Spinel 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 Hercynite and Spinel chemical formula.
- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
- Chemical formula of Spinel- MgAl2O4
Hercynite and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hercynite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.