Verdite and Alunite Physical Properties

Verdite and Alunite Chemical Formula

While comparing Verdite and Alunite 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 Verdite and Alunite chemical formula.

• Chemical formula of Verdite- NaFeS2•2(H2O)
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Verdite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Verdite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Verdite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Verdite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.