Gypsum and Pearl Physical Properties
Tenacity
Flexible
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.20-2.40
  
2.60-2.85
  
Fracture
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
  
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Perfect on {010}, distinct on {100}
  
none
  
Mohs Hardness
2
  
2.5-4.5
  
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
  
Not Available
  
Gypsum and Pearl Chemical Formula
While comparing Gypsum and Pearl 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 Pearl chemical formula.
- Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
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Gypsum and Pearl Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gypsum and Pearl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gypsum and Pearl Optical Properties during the identification of gemstone. Specific gravity of Gypsum is 2.60-2.85 whereas that of Pearl is 2.60-2.85.