Straight chisel (gui圭) with face and bird, Late Neolithic period, Longshan culture 龍山 (ca. 3000 - ca. 1700 BCE). Jade (nephrite). H x W x D: 18.3 x 3.4 x 0.8 cm (7 3/16 x 1 5/16 x 5/16 in). Gift of Charles Lang Freer, F1915.87 © 2017 Smithsonian Institution

Ceremonial implement of the type kuei [gui 圭]; short narrow form with beveled end and perforated handle; mottled dark olive brown, reddish brown, olive green, and orange; decoration: in sensible relief and channeled, a demon head on one side, a spread eagle on reverse, triple grooves across handle; dull luster.