Black Tourmaline Pendulum
Black is one of the many colours of tourmaline. However, since it is pleochroic, it might be green when viewed along a different axis. This crystal is also piezoelectric, which means that through mechanical action an electric pulse is formed, giving the stone an electric charge. It is especially powerful for protection and purification.
Pendulums have been used for ages for divination and determining the answer to any question which the rational mind cannot perceive. This is accomplished by allowing the body, through a process known as "muscle testing," to determine the outcome. Simply ask a question to which you know the answer to determine which circular or horizontal/vertical "+" motion is yes or no. Get relaxed, then ask your question!
Please note that due to natural variations in gemstone deposits, the pendulum you receive may not be identical to the one pictured.