Pargasite and Gahnite Physical Properties

Pargasite and Gahnite Chemical Formula

While comparing Pargasite and Gahnite 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 Gahnite 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 Gahnite- ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Pargasite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pargasite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pargasite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Pargasite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.