Emerald resonates with the heart chakra can be used to preserve love.  It is considered by many to be the stone of prophecy. For some the emerald acts as a tranquilizer for a troubled mind. The emerald is said to bring the wearer admiration increasing leadership characteristics. Physically, Emerald is used by healers to help heal the heart. The power of the Emerald is highest at the full moon.Some cultures thought the emerald would heal any disease of the eye. The emerald would be placed in a container of water overnight and the water would be poured on the eyes the next day.