Gypsies use the pendulum quite a lot.
One of the uses to which they put it is in determining whether or not a particular lover is the right one for you. The pendulum itself should be a ring suspended on a length of red silk thread or ribbon. Many girls use their mother's wedding band for the ring. The only other thing you need is a connection with the one you are wondering about. This can be an article of his or her clothing, a handkerchief, a watch, ring, or other piece of jewelry, a photograph, or anything similar that has a direct link with the person.