Rudraksha japa mala is generally used with Shiva mantra and it is usually the Panch Mukhi Rudraksha Mala which is used as a japa mala. Besides being used as a japa mala, the Rudraksha mala can also help to lower blood pressure and create stability within the entire system, if worn around the neck. Rudraksha mala has many healing properties that have been scientifically proved.
Crystal Mala can also be used as a japa mala because crystal balances all the energy Chakras while reciting "mantras" during meditation. Crystal beads also protect and heal by neutralizing negative influences