Agate pendants of this type were originally part of an elaborate ornamental set; see, for example, a set from the Warring States period, comprising crystal rings and beads and suspending a pair of very similar agate pendants and a further pair of agate huang at the bottom, excavated from the ancient city site of the Lu State in Qufu, Shandong province, illustrated in Gu Fang, The Complete Collection of Jades Unearthed in China, Beijing, 2005, pl. 203, together with another set discovered from the same tomb, suspending a single agate pendant, pl. 204. Another pair of closely related agate pendants, excavated from a Spring and Autumn period tomb at Jinsheng Village in Taiyuan, Shanxi province, is published in Yang Boda, ed., Zhongguo yuqi quanji [Complete collection of Chinese jades], vol. 1, Shijiazhuang, 2005, p. 232, no. 44, where the author notes there is a further pair discovered in a Eastern Zhou dynasty tomb in Linzi, Shandong province in 1972.