A LARGE NEOLITHIC MOTTLED GREY JADE CONG Liangzhu Culture, circa 3000-2500 B.C.A LARGE NEOLITHIC MOTTLED GREY JADE CONGLiangzhu Culture, circa 3000-2500 B.C.The tall tapering square tube with thick collars on each end, sectioned into thirteen tiers of matching panels angled over the four corners, each corner finely engraved with a stylized 'mask,' separated by a plain vertical band on each side, hollowed by drilling from both ends, leaving rough edge at the interior near the middle where the drills met, the stone of dark olive-green tones with opaque alterations from burial. 14 5/8in (37.2cm) high新石器時期 良渚文化 玉琮Compare the very large jade cong from the Sidun site illustrated and discussed by Sun in "Chinese Jades", R. Scott (ed.), Colloquies on Art & Archaeology in Asia, No. 18, Percival David Foundation of Chinese Art, London, 1997, p.58, pl.19, where the author notes that the Sidun site has been dated to the late Liangzhu period, after 2400 B.C. Another tall Liangzhu jade cong in the collection of Shanghai Museum is illustrated in the exhibition catalog, Gems of Liangzhu Culture, Hong Kong, 1992, pp. 158-159, no. 56.Compare also two other Neolithic jade cong from the Collection of Sir Joseph Hotung, illustrated by J. Rawson in Chinese Jade from the Neolithic to the Qing, London, 1995, pp. 128-9, nos. 3:5 and 3:6, where the author notes that comparable jade cong are in the British Museum and the Victoria and Albert Museum in London, and in major collections in the United States, including the Sonnenschein Collection at the Art Institute of Chicago, the Winthrop Collection in the Harvard University Art Museums and in the Freer Gallery of Art, Washington, D.C.