Period:Unknown Production date:3300BC-2200BC Materials:jade Technique:polished (?), drilled, Dimensions:Diameter: 34.20 centimetres Description: Disc-bi of opaque and variegated gr...

Period:Han dynasty Production date:206BC-220 Materials:glass Technique: Dimensions:Diameter: 9.30 centimetres Description: Bi disk. Covered with a grain-like pattern. Made of monoc...

Period:Unknown Production date:1050BC-221BC Materials:jade Technique: Dimensions:Diameter: 6 centimetres Description: Bi (miniature). Made of jade (brown). IMG Comments: