A Chinese pale green jade 'chilong' disc, Bi Probably Ming Dynasty Of pale celadon hue with cloudy inclusions, carved to one side with a writhing chilong with bifurcated tail, and to the other in low relief with lingzhi mushrooms. 5cm dia. FOOTNOTE: Bi discs appear from the neolithic period onwards and are associated with the heavens and the afterworld. Often found at the burial sites of high status individuals, bi disks were placed either side of the head or under the knees of the body. Being symbolic of the sky they were also used by the emperor during the sacrifice to heaven.