Emerald and Alunite Physical Properties

Emerald and Alunite Chemical Formula

While comparing Emerald 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 Emerald and Alunite chemical formula.

• Chemical formula of Emerald- Be₃Al₂SiO₆
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Emerald and Alunite Specific Gravity

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