 Mani stone

Mani stones are stone plates, rocks and/or pebbles, carved or inscribed with the six syllabled mantra of Avalokiteshvara ("Om mani padme hum", hence the name "Mani stone"), as a form of prayer in Tibetan Buddhism.The term mani stone may also be used to refer to stones on which any mantra or devotional designs (such as ashtamangala) are inscribed or painted.