A similar talisman is in the Zucker Collection, published Content, D.J.: Islamic Rings and Gems - the Benjamin Zucker Collection, London 1987, no.100, pp.333-4. Nine further pieces are in the Bibliothèque Nationale, Paris, and have been published by Kalus, L.: Catalogue des cachets, bulles et talismans islamiques, Paris, 1981, pp. 95-99, nos. 2.4-2.12.

Inscriptions on talismans are normally proper. Those in intaglio are rare. This talisman is one of a group of rock-crystal talimans of similar form inscribed in kufic on both sides, often very difficult to read. These inscriptions seem to contain invocations for rain.