Alunite and Rubellite Physical Properties

Alunite and Rubellite Chemical Formula

While comparing Alunite and Rubellite 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 Rubellite chemical formula.

• Chemical formula of Alunite- KAl3(SO4)2(OH)6
• Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Alunite and Rubellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.