Sillimanite and Kornerupine Physical Properties

Sillimanite and Kornerupine Chemical Formula

While comparing Sillimanite and Kornerupine 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 Kornerupine chemical formula.

• Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Sillimanite and Kornerupine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Kornerupine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Kornerupine Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.25-3.45 whereas that of Kornerupine is 3.25-3.45.