Hardystonite and Polyhalite Physical Properties

Hardystonite and Polyhalite Chemical Formula

While comparing Hardystonite and Polyhalite 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 Hardystonite and Polyhalite chemical formula.

• Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Hardystonite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hardystonite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hardystonite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Hardystonite is 2.78 whereas that of Polyhalite is 2.78.