Caledonite and Polyhalite Physical Properties

Caledonite and Polyhalite Chemical Formula

While comparing Caledonite 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 Caledonite and Polyhalite chemical formula.

• Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Caledonite and Polyhalite Specific Gravity

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