The amethyst. has long been used to open the spiritual and psychic centers, making it one of the power stones. It is also used as a meditation aid.
Some believe that the pendulum finds the connection to the intuitive parts of the mind. "Divining" with a pendulum is a method of connecting with a higher power in order to obtain information from a divine source. Scientific research indicates that the pendulum responds to electromagnetic energy that radiates from everything on Earth.
Read The Pendulum: Vibrational Frequency to learn more.