Bodhi seed malas are traditional in Tibet and Nepal. "Bodhi" in Sanskrit means enlightenment. Bodhi seeds are from the famous bodhi or bo tree where Siddhartha Gautama Buddha achieved enlightenment or “bodhi.” They aren't from the original tree of course.
Some beads are more effective at holding a charge. Pearls, lapis, amethyst, quartz, lotus seeds and bodhi seeds are a few that come to mind.