Cowrie shells are small, glossy shells that were historically used as currency in various cultures around the world. They are primarily derived from marine mollusks, particularly from the family Cypraeidae. Their unique shape and durability made them ideal for trade, and they were often strung together to form larger units of value. In addition to their use as money, cowrie shells also held cultural significance in many societies. They were often used in jewelry, rituals, and as symbols of wealth and status. Their widespread use as currency can be seen in regions such as Africa, Asia, and the Pacific Islands.