Heliodor and Sillimanite Physical Properties

Heliodor and Sillimanite Chemical Formula

While comparing Heliodor 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 Heliodor and Sillimanite chemical formula.

• Chemical formula of Heliodor- Be₃Al₂Si₆O₁₈
• Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Heliodor and Sillimanite Specific Gravity

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