Sillimanite and Labradorite Physical Properties

Sillimanite and Labradorite Chemical Formula

While comparing Sillimanite and Labradorite 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 Sillimanite and Labradorite chemical formula.

• Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

Sillimanite and Labradorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.