A wonderful grounding and protective crystal! It gives us a calming and peaceful feeling when worn. Provides inner strength and balance. Physically, black agate alleviates problems with bones and joints, mobility issues, shoulder, neck and back pain. Keeps the body in balance. Each pendant will vary in color. If you would like a particular pendant, please let me know and I will do my best. Approx 2.5 L x 1” w, nice large statement piece. Just add to your favorite silver necklace or cord.