A TURQUOISE FIGURE OF A BIRD WESTERN ZHOU DYNASTY |

of aerial view, depicting a bird in flight with wings widespread, the head with large round eyes flanking a pointed beak, finely incised with neat feathers, the turquoise of a rich blue-green tone with dark patches and rivering, the centre pierced with a circular aperture

Robert P. Youngman, The Youngman Collection of Chinese Jades from Neolithic to Qing, Chicago, 2008, pl. 47.