Sphalerite can help you to ground your energies and activate your lower 3 chakras.  It raises courage, drive and focus levels to height. Provides vitality and energy.  Powerful manifestation tool. Great protection stone that can block negative energy.  When it is clear as this one is it forms whilte crystals.  Other colors would be yellow and orange known as Cleiophane or golden sphalerite.  It also has a red tone known as Ruby Jack.