The book records 112 artefacts coming from the private collection of Constantine Schmidt-Ciazynski (1818-1889), a renowned art collector living in Paris and London, as well as magical gems coming from the National Museums in Warsaw, Poznan and Przemysl. Introductory chapter gives deep background information about Constantine Schmidt-Ciazynski and the history of his collection. The gems in the Catalogue chapter are thoroughly described, classified and photographed; each entry is supported by bibliography notes.