The jade carved ornament is of disc form with three small extruding angles, with center hollow hole, the jade is of yellowish-brown color tone with mottled interior and slight russet.|||Diameter: 2 1/4 in (5.7 cm)|玉璿璣|璿璣本為玉器名，即重型禮玉“琮”的別名。“璿璣”無論作為玉器名，還是作為北斗星別名，以及作為針灸穴位名，都與中國最古老的“蓋天”宇宙模型密切相關。此件璿璣玉質細膩，呈玻璃光澤微沁，實為難得。