Rosary beads provide a physical method of keeping count of the number of Hail Marys said as the mysteries are contemplated. By not having to keep track of the count mentally, the mind is free to meditate on the mysteries. A five-decade rosary contains five groups of ten beads (a "decade"), with additional large beads before each decade. The Hail Mary is said on the ten beads within a decade, while the Lord's Prayer is said on the large bead before each decade. A new mystery meditation commences at each of the large beads. Some rosaries, particularly those used by religious orders, contain fifteen decades, corresponding to the traditional fifteen mysteries of. Both five- and fifteen-decade rosaries are attached to a shorter strand, which starts with a crucifix, followed by one large bead, three small beads, and one large bead, before connecting to the rest of the rosary. A five-decade rosary consists of a "total" of 59 beads. Although counting the prayers on a string of beads is customary, the prayers of the Rosary do not require beads, but can be said using any type of counting device, by counting on the fingers, or by counting mentally. Single-decade rosaries Single-decade rosaries can also be used: the devotee counts the same ring of ten beads repeatedly for every decade. During religious conflict in 16th- and 17th-century Ireland severe legal penalties were prescribed against practising Catholics. Small, easily hidden rosaries were thus used to avoid identification and became known as Irish penal rosaries. Sometimes rather than a cross, other symbols of specific meanings were used: a hammer to signify the nails of the cross, cords to represent the scourging, a chalice to recall the Last Supper, or a crowing rooster signifying the denial of Peter. Materials and distribution The beads can be made from any materials, including wood, bone, glass, crushed flowers, semi-precious stones such as agate, jet, amber, or jasper, or precious materials including coral, crystal, silver, and gold. Beads may be made to include enclosed sacred relics or drops of holy water. Rosaries are sometimes made from the seeds of the "rosary pea" or "bead tree." Today, the vast majority of rosary beads are made of glass, plastic, or wood. It is common for beads to be made of material with some special significance, such as jet from the shrine of Saint James the Greater at Santiago de Compostela, or