A LARGE BUFF AND ALTERED RED JADE DISC, BINorthwest China, Neolithic PeriodCarved with a central hole with some traces of cutting mark, the mottled stone of dark green tone with areas of inclusions and calcification.24cm (9 1/2in) diam.Provenance: 中國西北部 新石器時代 玉璧Provenance:Acquired in Hong Kong in the 1980s來源：1980年代入藏於香港For another large jadebi disc from the Neolithic period, Northwest China, see an example from the Arthur M. Sackler collection, sold at Christie's New York, 18 March 2009, lot 277.參考賽克勒舊藏一件中國西北部新石器時代之玉璧，售於紐約佳士得，2009年3月18日，拍品277。