Lot 353. A brown and black jade cong, Neolithic period, probably Liangzhu culture, 6.4 cm, 2 1/2  inEstimate 30,000 — 40,000 HKD. Photo: Sotheby's.

of square section with a central aperture, the stone of a mottled greenish-celadon colour with some dark brown patches, wood stand 

Sotheby's. Chinese Art, Hong Kong, 01 juin 2017, 02:00 PM