These necklaces are made of agate and a double sided lobster clasp necklace that measures 18 inches long. The agate measures approximately 2 inches in width and 2-2.5 inches in length. You will ABSOLUTELY love this necklace! Agate Healing Properties: Agate properties connect with the energy of the Earth. They are thought to bring harmony to all aspects of the being, physical, spiritual and emotional. Using agate during times of unbalance, when it feels as if the yin and yang within you are operating out of proportion, can reintroduce an equilibrium to your tempered soul.