Types of Beads:
Beads can be divided into several types of overlapping categories based on different criteria such as the materials from which they are made, the process used in their manufacturing, the place or period of origin, the patterns on their surface, or their general shape.
Beads are still made from many naturally occurring materials, both organic and inorganic. However, some of these materials now routinely undergo some extra processing beyond mere shaping and drilling such as color enhancement via dyes or irradiation.
The natural organics include bone, coral, horn, ivory, seeds, animal shell, and wood. For most of human history, pearls were the ultimate precious beads of natural origin because of their rarity.