Nephrite and Sillimanite Physical Properties

Nephrite and Sillimanite Chemical Formula

While comparing Nephrite 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 Nephrite and Sillimanite chemical formula.

• Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
• Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Nephrite and Sillimanite Specific Gravity

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