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Lot 331. A brown jade ceremonial blade, fu, probably Neolithic period, 10 cm, 4 in. Estimate 15,000 — 20,000 HKD. Photo: Sotheby's.

of irregular trapezoidal form with bevelled edges, one side with a vertical tool mark, the top with a small hole, the stone of a variegated russet-brown and celadon colour   

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