It is a symbol of the never ending cycle. It is string of beads. The beads are of a kind of seed of dried fruit. It may be made of other material also such as crystal. In Buddhist Tradition, it is a special symbol of Avalokiteswar. It is also symbol of Prajnaparmita, Chunda, Vasundhara. In Hindu tradition, Brahma, Shiva, Ganesh and Saraswati also carry it.