清十九世紀 白玉乾卦龍紋方蓋盒

of square section, the cover carved in low relief with a trigram qian flanked by archaistic dragons long, forming the traditional pun for the Qianlong emperor, the sides bordered with twelve medallions enclosing various emblems, all against a floral diaper ground, the smoothly polished stone mottled with light grey inclusions