Details 6mm Diameter Beads Mini .338 Shell Casing 1mm Army Strong Stretch Elastic A portion of proceeds donated to help Veterans Why choose Black Onyx? Matte Black Onyx is a powerful protective stone that can shield the mind and body from electromagnetic energy. It absorbs and transforms negative energy, helping to prevent that drain of personal energy. Onyx assists with melancholy, the release of negativity and depression. It helps to calm your fears, leaving you feeling stable and secure.