Late Warring States/mid Western Han Dynasty Each circular disc with a small round perforation in the centre, meticulously and crisply carved in relief on both sides with a dense pattern of raised bosses neatly arranged in an hexagonal grid pattern, all within a raised border at the outer and inner edges, the lustrously polished semi-translucent stone of an even white tone with reddish-brown inclusions, box. Each 15.6cm (6 1/8in) diam. (3).