A Chinese russet jade cong Shang dynasty c.1600 BC-1028 BC
商 玉琮
A Chinese russet jade cong Shang dynasty c.1600 BC-1028 BC, the square-section body carved with a wide hollowed cylindrical foot and neck rim, the stone with cream and brown irregular striations, 14cm.
Cf. J Rawson, Chinese Jade from the Neolithic to the Qing, p.153, where other examples of cong of similar date are illustrated.