Oligoclase and Selenite Physical Properties

Oligoclase and Selenite Chemical Formula

While comparing Oligoclase 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 Oligoclase and Selenite chemical formula.

• Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Selenite- CaSO4·2H2O

Oligoclase and Selenite Specific Gravity

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