is known as the stone of endurance, a gentle, but vital, stimulator of chi, or life force, bringing physical strength & energy, stamina, focus & determination. its steady frequency calms the emotional body creating a lasting, stable energy for improving health or overcoming illness, setting goals & following through to completion, facing unpleasant tasks & having the courage to rectify wrongs. activates the base chakra. it is a stone of passion, useful for restoring & rejuvenating the libido, & in manifesting creative ideas. it provides vivid dream recall. wear or carry to alleviate stress & reconnect with earth’s grounding energies. its cleansing effect eliminates negativity, returning it to its source, & stabilizing the aura. it is an ideal worry or rubbing stone for soothing the nerves & restoring balance. marvelous for clearing the mind during meditation, prayer or contemplation. its high spiritual energy increases focus & endurance during long ceremonies or practices, & is helpful in establishing new spiritual disciplines. a valuable stone of protection, it guards against physical threats & assists in situations of danger. keep in the car to prevent accidents, theft or road rage, & place in the home or office to absorb electromagnetic & environmental pollution & radiation. may be used as a professional support stone for all jobs requiring physical strength & stamina, from police officers to trades workers, waitresses & waiters, & other high activity professionals. it also brings energy, alertness & emotional endurance to accountants, computer operators, military personnel & all who must continuously focus on tasks. said to prevent illness & help with dizziness, low blood pressure, menstruation, sex drive, upset stomach, vertigo, & weakness.