Rubellite and Topaz Physical Properties

Rubellite and Topaz Chemical Formula

While comparing Rubellite and Topaz 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 Rubellite and Topaz chemical formula.

• 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.
• Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

Rubellite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.