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