These come in a few different sizes and have all been cleansed and highly charged, and are in raw form so they haven't been tumbled or polished and may have rough edges.
This stone dispels negativity, takes care of electromagnetic smog given off by cell phones and other electronic devices, a grounding stone and it helps you achieve your goals. Medium is the size of a quarter or ping pong ball, small is the size of a nickel, and xs is the size of a dime or smaller. However, stone colors, shapes, sizes and weights will all vary.
Basic Ways to Use:
Place near electronic devices to lower radiation and electromagnetic smog
Carry with you for protection or to dispel negativity
Hold after meditation or other spiritual work to ground