Polyhalite and Hercynite Physical Properties

Polyhalite and Hercynite Chemical Formula

While comparing Polyhalite and Hercynite 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 Polyhalite and Hercynite chemical formula.

• Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
• Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Polyhalite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 4.39 whereas that of Hercynite is 4.39.