Pyeongyeong

This tuned sonorous chime, also introduced from China during the rule of King Yejong of Goryeo dynasty, is used in court music.
It consists of 16 L-shaped jade stone slabs hanging from a wooden frame, eight in two rows. The sound differs according to the thickness of the stone slabs.
During the rule of King Sejong of Joseon, jade was discovered in Namyang, Gyeonggi Province, and for the first time it was employed as instrumental material in Korea.