商 墨玉璇玑
璇玑为商代巫师用的祭器，向右旋转，以为国家转好运之意，有风调雨顺，国泰民安。
墨玉质，细腻光泽，带有褐白灰色沁。璇玑扁体，出戟环状，呈不规则圆形，边厚，沿薄，环外缘琢出等距雕出三个宽齿，在每齿上又雕出凸戟片状齿轮。
Shang Dynasty, A Large Jade Ritual Disc, Xuanji
Pierced with a central aperture with three flanges on the outer edge, interrupted with three sets of notched serrations.
The calcified jade well-polished to a mottled brownish grey-white with veining. Used in rituals as symbols of heaven and power.
Across: 8¼ in (21 cm)
Weight: 419 g