Indicolite Blue Tourmaline and Sillimanite Physical Properties

Indicolite Blue Tourmaline and Sillimanite Chemical Formula

While comparing Indicolite Blue Tourmaline and Sillimanite 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 Indicolite Blue Tourmaline and Sillimanite chemical formula.

• Chemical formula of Indicolite Blue Tourmaline- 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 Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Indicolite Blue Tourmaline and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Indicolite Blue Tourmaline and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Indicolite Blue Tourmaline and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Indicolite Blue Tourmaline is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.