Astrophyllite and Selenite Physical Properties

Astrophyllite and Selenite Chemical Formula

While comparing Astrophyllite 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 Astrophyllite and Selenite chemical formula.

• Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Selenite- CaSO4·2H2O

Astrophyllite and Selenite Specific Gravity

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