Copper with Tenorite
Unknown Owner
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Crystallized native copper, this coated with tenorite, coming off matrix. In good condition. Collected in April, 1998.The Old Colony Mine in Houghton County, Michigan was part of the Keweenaw Peninsula copper district, a region famous for native copper deposits hosted in basalt and conglomerate rock. The mine was developed in the late 19th century and worked underground to extract native copper from these volcanic formations. Operations contributed to the growth of the Michigan copper industry, which became one of the leading sources of copper in the United States during that period. The mine later closed as production declined and larger operations dominated the district.
Product details
SpeciesCopper
SizeSmall Cabinet
Dimensions5.5 x 3.0 x 2.7 cm
Added on03/12/2026
LocalityUSA, Michigan, Houghton County
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 03/2026 | Unknown Owner | $45.00 |
| — | Weinrich Minerals | Not disclosed |
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Mineral guide
Learn about Copper
native copper with spinel-twinned crystals and arborescences; notable from Lake Superior, Itauz, Dongchuan, Corocoro, prized for color and localities.Regional guide
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