Disk (<em>bi</em> 璧)

Perforated disk of the type pi [bi] 璧; bored from both sides, leaving pronounced median ridge; mottled light to medium olive greens and some reddish brown and slate-colored areas; partially covered on both sides with a silvery film of incipient disintegration; roughly cut saw marks on both sides; uneven in thickness. (Rim chipped and broken, numerous fissures and rough areas.)