Rings are just one of the many types of jewelry dating from this early period. Other types include bracelets, beads, and pendants.
Hunter, Erica. First Civilizations: Cultural Atlas for Young People. New York: Facts on File, 1994.
Kramer, Samuel Noah. Cradle of Civilization. Alexandria, VA: Time-Life Books, 1967.
Roaf, Michael. Cultural Atlas of Mesopotamia and the Ancient Near East. New York: Facts on File, 1990.