Golden earrings found in tombs from the Silla Kingdom, designated National Treasure No. 90 of South Korea in 1962. Earrings are pieces of jewellery attached to the ear via a piercing in the ear, or else clipped onto the ear, generally the earlobe in either case. They may be made of any number of materials, including metal, plastic, glass, precious stone, beads, wood, and bone. Earrings are worn by both sexes, although more common among women, and have been used by different civilizations in different times.Photograph: National Museum of Korea