Jade is the industry name for this beautiful deep green stone. Ours is actually a Serpentine, but takes a trained eye and a microscope to discern the difference between this material and the Jade it is named after. It is extremely tough and resistant to fracture and has been used to make choppers and blades since Neolithic times. It has been said that it brings strength and longevity to the wearer. It protects against failure and misfortune.