Lot 389. A jade 'mask' bead, possibly Neolithic period, Shandong Longshan culture (c. 3000 – c. 1900 BC); 5 cm, 2 in. Estimate 15,000 - 20,000 HKD . Lot sold 1,250,000 HKD (142,442 EUR ). Courtesy Sotheby's. of waisted columnar shape, the exterior incised...