When it comes to choosing the best pick among Green Gemstones gemstones, Nephrite is known to be a popular choice!Physical properties of Nephrite include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Nephrite Optical Properties are responsible for imparting various physical properties to its structure. Knowledge of these properties is equally important to gem-cutters as well as to consumers. Nephrite cleavage is nothing but the plane across which the crystal splits during cutting. and specific gravity of Nephrite is 2.90-3.10.
The physical properties of Nephrite, in fact, are imparted by the chemical composition of its individual molecule. The reactivity or inertness of the crystal is solely governed by its chemical structure. Chemical composition of Nephrite is represented by Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references.