A Pale Grey and Russet Jade 'Chilong' Cup Qing Dynasty, 18th Century

deftly carved with irregular sides rising from a flat base to an undulating mouthrim, the exterior finely incised with comma scrolls, one side carved in openwork with a clambering chilong forming the handle, the base with an incised inscription reading yong zhen ('Eternal Treasure'), the translucent stone of a light grey colour mottled with black specks and russet inclusions, wood stand