buddhist prayer beads are a traditional tool used to count the number of times a mantra is recited whilst meditating. they are similar to other forms of prayer beads used in various world religions; thus some call this tool the buddhist rosary.
malas are mainly used to count mantras. these mantras can be recited for different purposes linked to working with mind. the material used to make the beads can vary according to the purpose of the mantras used. some beads can be used for all purposes and all kinds of mantras.