The jade carved disc is of compressed form, the surface carved with raised archaic patterns, the jade is of yellowish-white color tone with russet.|||Diameter: 6 7/8 in (17.5 cm)|穀紋玉璧|玉色偏綠，有墨斑，局部有土沁。飾以減地穀紋。玉璧最早出現於新石器時代晚期，是禮天之物,以良渚文化最為多見。以蒼璧禮天、以黃琮禮地的理念為歷代所遵循。