the curved rounded sides divided into eight facets, rising from a short foot of corresponding shape to an everted rim, covered overall in a thick glaze of soft greyish-beige tone suffused with a network of dark crackles, save for the octagonal footring unglazed revealing the dark body.
Note: See a geyao octagonal cup of similar size, attributed to the Southern Song dynasty, in the collection of the Palace Museum, Beijing, included in Selection of Ge Ware: The Palace Museum Collection and Archaeological Discoveries, Beijing, 2017, cat. no. 61, together with microscopic views and a chemical analysis of the glaze, p. 150.
Sotheby's. Curiosity IV. Hong Kong, 02 Apr 2018, 10:30 AM