Pendulums can be used to answer yes and no questions, to indicate health problems or missing elements of your life, and to help make choices.
There are many theories about how and why pendulums work, but the one I like best is that the pendulum responds to the energy of our bodies, and like other tools of divination, it is therefore able to direct our energy toward the choice we are already inclined to make, but just need a gentle push in order to do so.
A pendulum is created by suspending a stone, crystal, piece of wood, or even a bead at the end of a chain or string. The swinging of the item on the end of the string is what leads the pendulum to divine the future.