Small perforated disk of the type pi [bi] 璧; semitranslucent, mottled greenish and brownish yellow; a beveled area on rim, one long crack. (Jenny F. So, Jade Project Database) Evenly round and quite evenly thick. Mottled greenish brownish material; see F1917.81. Conical hole (?), drilled off center, now polished smooth and straight.