Polyhalite and Kyanite Physical Properties

Polyhalite and Kyanite Chemical Formula

While comparing Polyhalite and Kyanite 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 Kyanite chemical formula.

• Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
• Chemical formula of Kyanite- Al2SiO5

Polyhalite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.