Crystal pendulums and dowsing pendulums are popular tools used for divination and can help you tune into your intuitive powers. Crystal pendulums are popular for dowsing and are available made from a variety of different stones – many of which carry their own unique properties too. All dowsing pendulums perform the same function regardless of what they're made of. Simply choose the shape and material that appeals most to you.
Pendulum users often feel that the answer to every question is already in the subconscious mind and that a pendulum may be used to form a link with this information on a very subtle level. The information a pendulum gives you - usually in the form of 'yes' or 'no' answers - through the manner of its rotation, can then help in pursuits such as finding missing objects, locating ley lines (energy lines in the earth), diagnosing within the human energy field and helping with decision making.
A pendulum should not be used as a crutch to help you decide everything in life. It should be used with the intention to truly help you grow, always seeking answers that can contribute to the greater good.