Hemimorphite, 11.8 cm, from the Elkhorn mine, Jefferson County, Montana; acquired in June 2001. Ex collections of Lazard Cahn, Maynard Bixby, the Chicago Field Museum of Natural History, and Dan Ehrling. Exhibited at The Perot Museum of Nature and Science. László Kupi photo.
Jefferson County, USA - a mineral province with pyrite fossil hybrids, North Table Mountain zeolites, and South Platte NYF pegmatites, prized by collectors.
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