Three different types of beads have been strung together in this necklace: long tubular stone beads, smaller circular spacers, and cowrie shells. It is not known how the beads were originally worn in antiquity, since any string or other material that would have held them together has long since disintegrated. Beads were worn as jewelry and sewn to clothing as early as the Neolithic period in the ancient Near East. Iran, ca. 9th century B.C. Used as an illustration for sequencing. Image 325321 from the Metropolitan Museum of Art in public domain.