$500Median
601Sold (12 mo)
$40Last sale
Updated 1d ago
Copper
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A sharp crystal of native copper 1.5 cm in size embedded within matrix. In great condition.Organized in 1854 following the discovery of native copper within an ancient indigenous mining pit, the Central Mine in Keweenaw County, Michigan, operated as one of the region's most successful and enduring fissure-deposit copper mines before permanently closing in July 1898. Geologically, the site is defined by transverse mineralized veins cutting through Precambrian basaltic lava flows and interbedded layers, most notably associated with hydrothermal activity that deposited rich masses of native copper alongside minerals like calcite and prehnite until faulting and exhausted ore bodies led to its eventual decline.
Product details
SpeciesCopper
SizeMiniature
Dimensions3.5 x 3.0 x 1.5 cm
Added on09/17/2026
LocalityUSA, Michigan, Central Mine
Current owner
Unknown Owner
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | 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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