Phlogopite and Nephrite Physical Properties
Tenacity
Tough
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.78-2.85
  
2.90-3.10
  
Fracture
None, Uneven
  
Splintery, Granular, Splintery, Granular, Gemstones (2009)
  
Cleavage
Perfect basal (001)
  
Not Available
  
Mohs Hardness
2-2.5
  
6-6.5
  
Chemical Composition
Not Available
  
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
  
Phlogopite and Nephrite Chemical Formula
While comparing Phlogopite and Nephrite 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 Phlogopite and Nephrite chemical formula.
>- Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Phlogopite and Nephrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phlogopite and Nephrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Nephrite Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 2.90-3.10 whereas that of Nephrite is 2.90-3.10.