When it comes to choosing the best pick among White Gemstones gemstones, Londonite is known to be a popular choice!Physical properties of Londonite include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Londonite 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. Londonite cleavage is nothing but the plane across which the crystal splits during cutting. Londonite cleavage is None,and specific gravity of Londonite is 3.34.
The physical properties of Londonite, 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 Londonite is represented by (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001).