Selenite and Gypsum Physical Properties

Selenite and Gypsum Chemical Formula

While comparing Selenite and Gypsum 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 Selenite and Gypsum chemical formula.

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• Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Selenite and Gypsum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Selenite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Selenite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Selenite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.