$383Median
416Sold (12 mo)
$15,000Last sale
Copper from Quincy Mine, Michigan, USA
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A superb well crystallized example of native copper from this classic Michigan locality. In super condition all around.
The Quincy Mine, located in Hancock, Houghton County, Michigan, is one of the most famous copper mines in the United States, earning the nickname "Old Reliable" for its consistent dividends. Geologically, the mine exploited the Pewabic Lode, a mineralized amygdaloidal flow within the Keweenawan-aged Portage Lake Volcanics. These deposits formed as native copper precipitated within the gas bubbles (vesicles) of ancient basaltic lava flows and between the grains of associated conglomerates. Historically, the Quincy Mining Company was established in 1846, and active mining operations began in earnest during the 1850s. The mine eventually reached incredible depths, with its Number 2 shaft extending over 9,000 feet along the dip of the lode. The operation remained a titan of the Copper Country for nearly a century until industrial production finally ceased in 1945. Today, the site is a National Historic Landmark, preserved as part of the Keweenaw National Historical Park, where visitors can still see the world's largest steam-driven hoist engine used during the mine's peak years.
Product details
SpeciesCopper
SizeLarge Cabinet
Dimensions19.0 x 11.0 x 2.0 cm
Added on05/13/2026
LocalityUSA, Michigan, Quincy Mine
Current owner
Unknown Owner
- Acquired
- Nov 2026
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Weinrich Minerals | Not disclosed |
Learn more
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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