jade tablet, square at the base and rounded or pointed at the top, hel
Depicts a ceremonial jade tablet pointed at the top.
《說文》：“圭，瑞玉也，上圜下方。公執桓圭，九寸；侯執信圭，伯執躬圭，皆七寸；子執穀璧，男執蒲璧，皆五寸。以封諸侯。从重土。楚爵有執圭。珪，古文圭从玉。”