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Copper/Silver "halfbreed"
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Silver from Caledonia Mine, Seaman Mineral Museum
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Thomsonite Display, Seaman Mineral Museum
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Copper in Calcite from Quincy Mine, Seaman Mineral Museum
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Copper in Calcite, Seaman Mineral Museum, Houghton Co.
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Silver crystals, Seaman Mineral Museum, Houghton, Co.
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Lake Superior Agate, Esrey Park, Keweenaw Co. MI
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Lake Superior Agate, Keweenaw Co. MI
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Calcite Crystals, Copper Falls Mine, Keweenaw Co. MI
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Copper Crystals, Red Jacket Shaft, Houghton Co. MI
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Fluorite, Copper Harbor Conglomerate, Keweenaw Co. MI
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Copper crystal. Cliff Mine, Keweenaw Co. MI
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Datolite nodule. Quincy Mine, Houghton Co. MI
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Datolite nodule, Arcadian Mine, Houghton Co. MI
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Datolite. Iron City (Empire) Exploration, Keweenaw Co. MI
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Datolite. Mandan Gravel Pit, Keweenaw Co. MI
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