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| | Minerals at Mines: Copper Country Mineral Retreat |
 | | CENTRAL MINE, KEWEENAW COUNTY : native copper, native silver, copper/silver "halfbreeds", native copper crystals, copper chisel chips, chlorastrolite, pumpellyite, datolite nodules, prehnite, epidote crystals, natrolite |
 | | MOHAWK #1 MINE, HOUGHTON COUNTY: native copper, native copper crystals, native silver, native silver crystals, native copper/silver "halfbreeds", prehnite, epidote crystals, "mohawkite"/copper arsenides |
 | | SENECA # 1 MINE, KEWEENAW COUNTY : native copper, native copper crystals, native copper/silver "halfbreeds", datolite, "mohawkite"/ copper arsenides, epidote, prehnite |
| www.museum.mtu.edu /copper_country_mineral/minerals_at_mines.htm (372 words) |
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