Dowsing has been used for centuries to find water. The pendulum method has many applications. It has been used to find missing people and items, heal negative energy, or detect health problems. A necklace can make a great pendulum. And the more you keep it with you, charging it with your own healing energy, the better it is said to work. Have you ever seen someone dangle a necklace over a pregnant woman's stomach in order to predict the sex of the baby? Same thing.