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Native copper, Keweenaw Peninsula, Michigan, United States; 9.5 cm wide
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Native copper spinel law twinned crystals, Keweenaw Peninsula, Michigan, United States; 9.7 cm across
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Crystallised native copper, Keweenaw Peninsula, Michigan, United States; 15 cm across
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Native copper with calcite, Keweenaw Peninsula, Michigan, United States
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Native copper with analcite crystals, Keweenaw Peninsula, Michigan, United States; 15 cm tall
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Native copper, Keweenaw Peninsula, Michigan, United States; 4.5 cm across
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Native copper, Keweenaw Peninsula, Michigan, United States; 7 cm across
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Native copper on quartz, Keweenaw Peninsula, Michigan, United States; Ex Clarence Bement and American Museum of Natural History Collections; 12.1 cm across
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Prehnite with untarnished native copper inclusions, Keweenaw Peninsula, Michigan, United States; 6.3 cm across
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Barite crystal with native copper, Keweenaw Peninsula, Michigan, United States; Ex Ted Scholz Fine Mineral Specimen Collection; 6.3 cm tall
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Calcite crystal with native copper inclusions, Quincy Mine, near Hancock, Houghton County, Michigan, United States; 3.2 cm tall. US$250
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Native copper, Keweenaw Peninsula, Michigan, United States; 17.6 cm across with a crystal cluster of 6 cm across on the right hand of of this piece