Nephrite and Polyhalite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.90-3.10
  
2.78
  
Fracture
Splintery, Granular, Splintery, Granular, Gemstones (2009)
  
Conchoidal, Brittle
  
Cleavage
Not Available
  
Perfect on {10 1 }; parting on {010}
  
Mohs Hardness
6-6.5
  
3.5
  
Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
  
Not Available
  
Nephrite and Polyhalite Chemical Formula
While comparing Nephrite and Polyhalite 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 Nephrite and Polyhalite chemical formula.
- Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
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Nephrite and Polyhalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Nephrite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nephrite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Nephrite is 2.78 whereas that of Polyhalite is 2.78.