Description: Jade. China, Late Neolithic period, early Bronze age, c.2500-2000 BC
Pair of small discs in completely altered jade: the mottled stone is strongly weathered and the colour chalky white, with darker black spots and veins. The smaller of the two discs is more brownish in colour, probably because of a higher content of inclusions in the jade. Both discs are polished, with softened borders: the hole is straight with some faint traces of tool marks on the wall.
A disc with similar alteration, part of the Robert H. Ellsworth collection, was auctioned at Christie's New York on 19 March 2015, Sale 11420, Lot 479:
Still from the Ellsworth collection is a group of seven small discs in jade with a similar, extensive alteration of the jade (Lot 8210 of the same sale):
A similar creamy gray-coloured bi disc is in the Harvard Art Museums/Arthur M. Sackler Museum, Bequest of Grenville L. Winthrop (object number 1943.50.576), published in M. Loehr and L. G. Fitzgerald Huber, Ancient Chinese Jades, Cambridge 1975 n.89
一雙玉璧 - 新石器時代晚期, 青铜器時代早期, 公元前2500-2000
直径 9.9 - 9.8 厘米; 孔径 2.4 - 2.8 厘米; 密 0.5 厘米
DIAMETER 9.9 AND 9.8 CM - HOLE 2.4 AND 2.8 CM - THICKNESS 0.5 CM
From an Italian collection
Notes: All jades in this catalogue will soon be published in the forthcoming jade book by FILIPPO SALVIATI: "THE MYSTERIOUS STONE - Archaic and Antique Chinese Jades from Neolithic to Han from Private Collections".
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Professor Salviati teaches Chinese Art at the University "La Sapienza" in Rome, Faculty of Oriental Studies, and is one of the world's most recognized jade experts, specialized in archaic jades until the Song Dynasty. Hi-resolution pictures of all jades are to be found in our web-site, and can be enlarged so that handwork, age-related traces of weathering, as well as colors are very well recognizable.