A Large Celadon Jade Bi Disc, Spring and Autumn Period to Warring Sates Period (Private English Collection)of circular section centered with an aperture, each side carved with a dense network of raised spirals, the inner and outer edges with a raised rim carved with symmetry patterns, the stone of even celadon tone with calcified patches and russet inclusions and dark streaksProvenance: Private English Collection originally acquired from Netherlands before 199011cm diameter