璋一般由援(鋒刃),欄(作成扉牙狀的繩索系痕部分),內(木柄鑲裝部分)組成。 器物形態當源自戈、鉞、戚一類兵器。 璋為中國古代禮器六器之一最早見於夏代二裡頭文化遺址。《周礼·春官·典瑞》：“牙璋以起军旅，以治兵守。” 郑玄 注引 郑司农 曰：“牙璋瑑以为牙。牙齿，兵象，故以牙璋发兵，若今时以铜虎符发兵。”頂端的扉牙數目與欄的扉牙數目成正比, 可能表示牙璋持有者官階的高低。本玉璋上端为兩个尖峰,中下方两边各有三锯齿,两面各有两行浅浮雕方形回纹, 全器底子極為平整, 拋光尤為細膩, 光潔鑑人. 全器有增生晶體及多處出現溶蚀孔。Carved with green tone jade, the object is a zhang with seven shape points at the end, at the lower part of the blade, two low relief carvings of rhombus circling cloud motif which is still popular in the Shang and Western Zhou Dynasties. With mastery of workmanship, this zhang is extra well polished. Antiquity evidence is several natural dissolved pits.