When gems are working effectively they will absorb the negative energy from the electromagnetic field of the wearer. Over time they may lose their effectiveness and have to be cleaned or “re-energized”. The method we recommend is to use a North-South Horseshoe Magnet (3/4″ inch in width is good). Run the magnet back and forth 2 to 3 inches above the piece of Navaratna Jewelry several times. Do this every 2-4 weeks and the gems will be re-energized. This will allow them to continue to work effectively in helping diminish negative astrological influences and enhance positive ones.