Late Warring States Period to Early Han Period (3rd-2nd century BC)
Diameter: 3.5 inches
This superb bi disc consists of mold cast glass emulating the mineral quartz crystal.
After being cast, the intricate surface designs on both sides were finished off using wheel cut and abrasion techniques, similar to those used in jade working of the period. Decoration on both sides give the bi disc an almost hollow appearance. The roundness of the disc is not exactly perfect as there is some slight irregularity. A frosted appearance is the result of age and chemical interaction from prolonged burial. This bi disc is unlikely to have been used as a jewelry object but was possibly a status symbol of the period. In our opinion, the subject matter, workmanship and material suggest a 3rd. to 3rd. Century date for this work of art.
Reference Number: 2337
Published: Private Passions, Connoisseurship in Collecting Chinese Art. Sam Bernstein, S. Bernstein & Co., San Francisco. 1998. Plate 7.
A Western Han period example of white glass with similar grinding evidence is illustrated in A Chorus of Colors: Chinese Glass from Three American Collections. Claudia Brown. The Asian Art Museum of San Francisco, 1995, Page 33, Plate 4.
At this time, there is no published example of an identical bi disc of this type. The object remains unique until such time as the archaeological record reveals another of the period.
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