Sillimanite and Nephrite Physical Properties

Sillimanite and Nephrite Chemical Formula

While comparing Sillimanite and Nephrite 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 Nephrite chemical formula.

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

Sillimanite and Nephrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Nephrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Nephrite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.90-3.10 whereas that of Nephrite is 2.90-3.10.