Variscite and Alunite Physical Properties

Variscite and Alunite Chemical Formula

While comparing Variscite 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 Variscite and Alunite chemical formula.

• Chemical formula of Variscite- AlPO₄ · 2(H₂O)
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Variscite and Alunite Specific Gravity

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