When it comes to choosing the best pick among Brown Gemstones gemstones, Andalusite is known to be a popular choice!Physical properties of Andalusite include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Andalusite 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. Andalusite cleavage is nothing but the plane across which the crystal splits during cutting. Andalusite cleavage is Good on , poor on ,and specific gravity of Andalusite is 3.05-3.21.
The physical properties of Andalusite, 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 Andalusite is represented by Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references.