Neolithic cultures along the east coast of China are noted for the large number of jade artifacts they produced. Many took the shapes of common stone tools such as adzes and knives. Others have forms that suggest no obvious function. Among the latter is the notched disk, which first appeared in the Middle Neolithic period (ca. 4000 B.C.) and was gradually discarded from the jade repertory during the first millennium B.C., in the early Bronze Age. Our recently acquired disk is representative of the type found at sites of the Late Neolithic Longshan culture in Shandong Province. Longshan jades are known for their fine workmanship and the sheer quality of the stone—as can be seen in this example.