Bertrandite and Selenite Physical Properties

Bertrandite and Selenite Chemical Formula

While comparing Bertrandite and Selenite 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 Bertrandite and Selenite chemical formula.

• Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Selenite- CaSO4·2H2O

Bertrandite and Selenite Specific Gravity

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