Afghanite and Sellaite Physical Properties

Afghanite and Sellaite Chemical Formula

While comparing Afghanite and Sellaite 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 Afghanite and Sellaite chemical formula.

• Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
• Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

Afghanite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.