Neolithic period|Carved as a thin rectangular blade with tapering sides, pierced with two apertures to one end flanked by a pair of notches to the edge, the stone of a mottled and creamy tone, fitted box. 41.6cm (16 3/8in) long (2).|新石器時代 玉牙璋Provenance: the Sze Yuan Tang collection, acquired in Hong Kong circa 1980s-1990s來源： 思源堂收藏，於約1980至1990年代購自香港Compare a related brownish-olive jade ceremonial blade, Qijia Culture, circa 2000 – 1700 BC, of similar form but smaller in size, which was sold at Christie's New York, 18 March 2009, lot 276. Another related brownish-olive jade ceremonial blade, Qijia Culture, was sold at Christie's New York, 13-14 September 2012, lot 1002.