at $750,000. The diamond was set in a hat aigrette and displayed together with other crown jewels in the Imperial Treasury in display case XIII. In 1865 the diamond's weight and specificities were properly documented by Dr. Moritz Hoernes, head of the Imperial and Royal Court Mineral Cabinet. A plaster cast was also made. A rhinestone model was made at L. Saemann in Paris, with great care taken that the colour tone of the glass replica corresponded as closely as possible to the original stone. The colour of the Florentine was described as "wine mixed tenfold with water". This historic copy is kept at the Natural History Museum, Vienna. After the fall of the Austrian Empire after World War I, the stone by order of Emperor Charles I of Austria was removed from the Imperial Treasury and taken with him into exile. The stone was stolen some time after 1918 by a person close to the Imperial family and taken to South America with other gems of the Crown Jewels. After this, it was rumoured that the diamond was brought into the United States in the 1920s and was recut and sold. The Florentine jeweller Paolo Penko recreated the diamond with Zirconium in a set as it appeared based on historical records and description when Archduchess Maria Maddalena of Austria (1589–1631) wore it. This is exhibited at the Palazzo Medici-Riccardi in Florence. In literature The Florentine Diamond plays a central role in Amy Meyerson's 2020 novel The Imperfects, the 2021 novel The Mists of Morne by Justin B. Hodder, as well as the 2022 novel Der rote Diamant (The Red Diamond) by Thomas Hürlimann. See also List of diamonds References Further reading Shipley, Robert M. (1936). Important Diamonds of the World, pp. 15–18. Gemological Institute of America, USA, Vol. 2, No. 1 (Spring 1936) External links Yellow diamonds Imperial Treasury, Vienna Individual diamonds Golconda diamonds Stolen works of art