Gogok
Gobeunok or gogok are comma-shaped or curved beads and jewels that appeared from middle age of Mumun Period (850 to 550 BC) through the Three Kingdoms of Korea (57 BC to 668 AD). The Gogok (곡옥; 曲玉) is posited by researchers to have been a symbol of prestige among Mumun culture community leaders as the tombs of presumably powerful figures were oftentimes accompanied by bronze daggers, stone daggers, and comma-shaped jewels.