Gemstone Pendulum.

Real Amethyst Pendulum

Pendulum dowsing can be used in a variety of different ways. In its most simple form, you can use it to answer questions or aid in decision making. Pendulums can also be used for:

Healing purposes and identifying allergies.

To cleanse and dispel negativity in a room.

To help you find lost objects or pets.

To find water or ley lines (dowsing rods are often used for this too, which work in a similar way to a pendulum).