The jade disc is of compressed form with large center hollow hole, rounded on the edges and inside, the jade is of dark green color with russet.|||Diameter: 4 7/16 in (11.3 cm)|古玉璧|青玉质地，器身局部被鸡骨白色沁斑所覆盖，体扁平，圆形。精心打磨，素面无纹。整器形式古朴，去地平整，工艺精良，体量周正，比例协调，线条流畅自然，深具上古礼器之神秘威严，令人爱不释手。