商 玉刀

of trapezoidal form, carved with a slightly curved upper edge tapering towards the cutting edge, the perpendicular edges similarly worked with one end tapering towards the longer end, the bevelled edge subtly worked with faint 'V'-shaped depressions, pierced with two apertures towards both ends of the blade, one in the centre, another near the upper edge, the smoothly polished stone of an attractive greyish-green colour mottled with brown and black inclusions, stand

A.W. Bahr 收藏
賽克勒（Arthur M. Sackler）收藏
紐約佳士得1994年12月1日，編號88
紐約佳士得2002年9月20日，編號214

S.C. Nott，《Chinese Jade Throughout the Ages》，紐約，1937年，圖版XIV:A。

It is rare to find a neolithic jade blade of this type, that has been recarved at a later date. It is likely to have been reworked in the late Shang dynasty, modifying the blade slightly from one shape to another, in particular from dao-blade to gui-blade and sometimes vice versa. The reworking of this blade is identified by the different location of the perforated holes, both of which are drilled from one side only. This reworking suggests a date to a post-Erlitou and early Shang context.

Another archaic jade blade with similar stone colour from the collection of Mr. and Mrs. Richard C. Bull, was included in the exhibition, Arts of the Chou Dynasty, Stanford University Museum, February 21-March 28 1958, no. 18.

Comparable blades of similar stone have been published; one in the collection of Mr. and Mrs. Richard C. Bull, included in the exhibition, Arts of the Chou Dynasty, Stanford University Museum, February 21-March 28 1958, no. 18. Another in the collection of Mrs. Rafi Y. Mottahedeh, was included in the O.C.S. exhibition, Chinese Jade throughout the ages, Victoria and Albert Museum, London, 1 May-22 June 1975, no. 27.