Groupings
The groupings are called "weeks," in contrast to the Dominican rosary which uses five groups of ten beads called "decades." The beads between and usually larger than the "weeks" beads are called "cruciform" beads. When the loop of beads is opened into a circular shape, these particular beads form the points of a cross within the circle of the set, hence the term "cruciform." Next after the cross on Anglican prayer bead sets is a single bead termed the "invitatory" bead, giving the total of thirty-three. The beads used are made of a variety of materials, such as precious stones, wood, colored glass, or even dried and painted seeds.
Anglican prayer bead sets are made with a variety of crosses or, occasionally, crucifixes. The Celtic cross and the San Damiano cross are two which are often used.
Read more about this topic: Anglican Prayer Beads