Alunite and Covellite Physical Properties

Alunite and Covellite Chemical Formula

While comparing Alunite and Covellite 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 Alunite and Covellite chemical formula.

• Chemical formula of Alunite- KAl3(SO4)2(OH)6
• Chemical formula of Covellite- CuSMichael O’Donoghue , Gems, Sixth edition (2006) More from other references

Alunite and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.