This is Pendulum necklace - just like the pendulums the sisters used on Charmed when they scryed. You can wear it as a necklace or use it for your own scrying. These are made from hand cut natural crystals. Because of this the size varies slightly but each crystal ranges from 1 - 1.5" in height and from 1/2 - 1" in width. They are hung on a black leather cord which measures 26". The colors available are clear & amethyst.