When it comes to choosing the best pick among Black Gemstones gemstones, Nacre is known to be a popular choice!Physical properties of Nacre include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Nacre 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. Nacre cleavage is nothing but the plane across which the crystal splits during cutting. .
The physical properties of Nacre, 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.