\013The term cut base means that the point is in its natural shape and only the point has been polished rather than being shaped mechanically. \012
\012\013Crystal points are often used to direct energies through the apex of a point.\012
\012\013Since black tourmaline is pleochroic, it might also be green when viewed along a different axis. This crystal is also piezoelectric which means that through mechanical action an electric pulse is formed, similar to quartz. Tourmaline is sought after as a talisman of protection to deflect and counteract negative energies. It is also used to guard against radiation and environmental pollutants.