Gogok

Gobeunok or Gogok are comma-shaped or curved beads and jewels that appeared in prehistoric Korea through the Three Kingdoms period. Gogok is also sometimes romanized as "kogok" and "kokkok" or "kokok." They are also found in China and other parts of Asia, but are most numerous in Korea and Japan, where they are known as magatama. Although usually made from jadeite, they have been discovered made from many different materials such as nephrite, stone, clay, bone and glass. They range in size range from 1 to 10 cm, have a small hole in the middle of the round part for threading. Used as earrings and necklaces, and as decoration on crowns, belts, and bracelets. Some are further decorated with gold or silver attachments.