The Pentagram is a symbol of a star encased in a circle. Always with 5 points (one pointing upward), each has its own meaning. The upward point of the star is representative of the spirit. The other four points all represent an element; earth, air, fire, and water. All these things contribute to life and are a part of each of us.
To wear a pentagram necklace or other form of jewellery is to say you feel the connection with the elements and respect the earth.