A very decorative jade disc "Bi"
Of dark yellow jade with circular form with a small central aperture, incised with a dense motif of spiral scrolls and delicate hexagon shaped studs in high relief, boarded by wide bands in low relief. Yellow jade with signs of calcination.
Diameter: 14.7cm
Style of: Late Zhou (5th – 3rd century BC), age determination uncertain
http://www.christies.com/lotfinder/lot/an-archaistic-celadon-and-brown-jade-bi-5891033-details.aspx?from=searchresults&intObjectID=5891033&sid=75069caa-29b9-479b-88fe-8bbd0240594f. http://www.sothebys.com/en/auctions/ecatalogue/2014/chinese-art-hk0525/lot.1297