Here is a history of the rosary.
Don Marco discusses the comfort of the beads.
Sacramentals should be things of beauty. The soul thrives in an environment of chaste loveliness, harmony, and order. Finely crafted beads invite to prayer. There is no shame in going to God by means of the senses He has given us. The Word became flesh so that we, in our flesh and not in spite of it, might be able to go to God.