Feldspar and Rubellite Physical Properties

Feldspar and Rubellite Chemical Formula

While comparing Feldspar 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 Feldspar and Rubellite chemical formula.

• Chemical formula of Feldspar- KAlSi3O8
• 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.

Feldspar and Rubellite Specific Gravity

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