KATGI Cross Tungsten Brazil Hematite Steel Magnetic Energy Black Stone Therapy Bracelet (WOMEN) Limited Edition Austrian Crystals Cross Tungsten Steel Premium Crafted Brazil Hematite Steel Magnetic Energy Black Stone Therapy Chain Bracelet (WOMEN) Anti-bacterial, no rust, wear allergies to help relax muscles Positive and negative potential to eliminate electromagnetic waves Balance the body positive and negative potentials Hassle-free return & exchange policy. Satisfaction guarantee