Malachite and Alunite Physical Properties

Malachite and Alunite Chemical Formula

While comparing Malachite 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 Malachite and Alunite chemical formula.

• Chemical formula of Malachite- Cu₂CO₃(OH)₂
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Malachite and Alunite Specific Gravity

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