Ruby and Alunite Physical Properties

Ruby and Alunite Chemical Formula

While comparing Ruby 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 Ruby and Alunite chemical formula.

• Chemical formula of Ruby- Al ₂ O ₃
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Ruby and Alunite Specific Gravity

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