Disk (<em>bi</em> 璧)

Perforated disk of the type pi [bi] 璧; bored from both sides, leaving median ridge; mottled lime-yellow and pale greens with reddish-brown strata and veinings; profuse cream-colored incipient disintegration in fissures and veinings, of a smooth enamel like texture; surface contours uneven, a saw mark on each side. (Rim broken in several places.)