Green and black agate Agate's most noticeable properties overall are balancing yin/yang energy, courage, protection, healing, and calming. Historically it was placed in water for cooking or drinking to dispel sickness. TheMetaphysical and Healing Properties Lore of any specific type of agate depend to some extent on the color of the agate, but all agates have certain things in common. Comes on a 17 inch silver chain.