The subject of a conch shell in cloisonn/ae enamel appears to be very rare, if not unique. The conch shell, sankha, is one of the Eight Buddhist Emblems, symbolising the fame of Buddha's teachings. Conch shell horns were used in Buddhist ceremonies during the Qing period.
A conch shell carved with lotus designs supported on a very similar stand in the National Palace Museum, Taipei is illustrated in Emperor Ch-ien-lung's Grand Cultural Enterprise, Taipei, 2002, p. 49, no. I-36.