In January 1993, a gunman murdered seven people in a fast-food restaurant in Palatine, a suburb of Chicago. In his dual roles as an administrative executive and spokesperson for the police department, ...
Figure 1. A pair of trapiche emerald slices from Colombia, 10.92 carats total. Photo by Kevin Schumacher; courtesy of Mayer & Watt. Jeffery Bergman is known in the trade as a collector of trapiche ...
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