This set of “Historical Diamonds of the World” is really a fake! The Hope Diamond (45 carats), the Kohinoor (186 carats), the Grand-Mogul (280 carats), and the 12 other famous “diamonds” in the box are actually made from hand-cut quartz crystals. They replicate the exact cuts and dimensions (but not the color) of the real gems. One hundred sets were made ca. 1939 by the Gemological Institute of America in cooperation with DeBeers. Jewelers would use them to explain the variety of cuts to prospective customers. They were acquired in Utah by avid mineral collectors in the 1950s and recently donated to the Museum by a local couple.