Shell money most valued by the Native American tribes of the Pacific Coast from Alaska to northwest California was "Dentalium shell", a species of long narrow marine shelled mollusk, a tusk shell or scaphopod. The tusk shell is naturally open at both ends, and can easily be strung on a thread. This shell money was valued by its length rather than the exact number of shells; the "ligua", the highest denomination in their currency, was a length of about 6 inches. Farther south, in central California and southern California, the shell of the olive snail "Olivella biplicata" was used to make beads
Prayer beads can also be used for repetitive prayer. While there are liturgical churches using prayer beads in prayer, non-liturgical Christian churches do not use them. In Islam, prayer beads are referred to as Misbaha (Arabic: مسبحة "mas'baha" ), Tasbih or Sibha and contain 99 normal-sized beads, (corresponding to the Names of God in Islam) and two smaller or mini beads separating every 33 beads. Sometimes only 33 beads are used, in which case one would cycle through them three times. The beads are traditionally used to keep count while saying the prayer. The prayer is considered a form of dhikr that