Anhydrite and Feldspar Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.90-2.98
  
2.56-2.75
  
Fracture
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)
  
Cleavage
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
  
two or three
  
Mohs Hardness
3.5
  
6-6.5
  
Chemical Composition
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
  
Not Available
  
Anhydrite and Feldspar Chemical Formula
While comparing Anhydrite and Feldspar 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 Anhydrite and Feldspar chemical formula.
- Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
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Anhydrite and Feldspar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Anhydrite and Feldspar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Feldspar Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 2.56-2.75 whereas that of Feldspar is 2.56-2.75.