It is rare to find jade silkworm pendants of this fine quality, in such a good state of preservation. An individual example in Harvard Art Museum, object no. 1943.50.194, is illustrated in Max Loehr and Louisa G. Fitzgerald Huber, Ancient Chinese Jades from the Grenville L. Winthrop Collection in the Fogg Art Museum, Harvard University, Cambridge, 1975, cat. no. 310.