For an almost identical rock crystal snuff bottle carved with the Eight Daoist Emblems, see H. Moss, Chinese Snuff Bottles of the Silica or Quartz Group, no. 62, London, 1971. Another very similar snuff bottle, but carved with the Eight Buddhist Emblems, is illustrated by Moss, Graham, and Tsang, A Treasury of Chinese Snuff Bottles, The Mary and George Bloch Collection, Vol. 2, Part 2, Quartz, Hong Kong, 1998, pp. 416-18, no. 334.