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Silver, Copper
Silver and copper, 14.9 cm, from the North Kearsarge mine, Kearsarge amygdaloid lode, Calumet, Houghton County, Michigan. Ex American Museum of Natural History (1972), collection of Lincoln Ellsworth (1880–1951). From I. Philip Scalisi (1983). Pictured in Rocks & Minerals, July–August 2007. Jeff Scovil photo.
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