Hibonite and Spinel Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.84
  
3.64-3.66
  
Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
{0001} good, {10 1 0} parting
  
None, but may exhibit slight parting
  
Mohs Hardness
7.5-8
  
8
  
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
  
MgAl2O4
  
Hibonite and Spinel Chemical Formula
While comparing Hibonite 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 Hibonite and Spinel chemical formula.
- Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
- Chemical formula of Spinel- MgAl2O4
Hibonite and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hibonite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hibonite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Hibonite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.