Hibonite and Gypsum Physical Properties
Tenacity
Not Available
  
Flexible
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.84
  
2.20-2.40
  
Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
  
Cleavage
{0001} good, {10 1 0} parting
  
Perfect on {010}, distinct on {100}
  
Mohs Hardness
7.5-8
  
2
  
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
  
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
  
Hibonite and Gypsum Chemical Formula
While comparing Hibonite and Gypsum 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 Gypsum chemical formula.
- Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
- Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Hibonite and Gypsum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hibonite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hibonite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Hibonite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.