This necklace are made of agate and a ball chain necklace that measures 18 inches long. The agate measures approximately 1 inch in width and 2 inches in length. 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.