When it comes to choosing the best pick among Brown Gemstones gemstones, Alabaster is known to be a popular choice!Physical properties of Alabaster include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Alabaster 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. Alabaster cleavage is nothing but the plane across which the crystal splits during cutting. and specific gravity of Alabaster is 2.30.
The physical properties of Alabaster, 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 Alabaster is represented by CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001).