Pargasite and Iddingsite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.04-3.26
  
2.5-2.8
  
Fracture
Splintery, Brittle, Uneven
  
Not Available
  
Cleavage
{110} perfect
  
{???} Perfect
  
Mohs Hardness
5-6
  
3
  
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
MgO.Fe2O3.3SiO2•4(H2O)
  
Pargasite and Iddingsite Chemical Formula
While comparing Pargasite and Iddingsite 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 Pargasite and Iddingsite chemical formula.
- Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Iddingsite- MgO.Fe2O3.3SiO2•4(H2O)
Pargasite and Iddingsite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pargasite and Iddingsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pargasite and Iddingsite Optical Properties during the identification of gemstone. Specific gravity of Pargasite is 2.5-2.8 whereas that of Iddingsite is 2.5-2.8.