Prendeville, J.: Explanatory catalogue of the proof-impressions of the antique gems possessed by the late Prince Poniatowski and now in the possession of John Tyrrell, Esq. (1841): 863
The Wellington Gems (1977) [London, Market, S.J. Phillips]: 419.8
Comments: SET IN AN AMETHYST NECKLACE WITH TWELVE CAMEOS AND INTAGLIOS
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