Pargasite and Williamsite Physical Properties

Pargasite and Williamsite Chemical Formula

While comparing Pargasite and Williamsite 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 Williamsite chemical formula.

• Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Pargasite and Williamsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pargasite and Williamsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pargasite and Williamsite Optical Properties during the identification of gemstone. Specific gravity of Pargasite is 2.51-2.63 whereas that of Williamsite is 2.51-2.63.