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Copper
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Wonderful grouping of native copper crystals, one of them an enormous 8.5 cm across and very well defined and sharp for the species. No points of attachment crystallized all around, this is in super condition.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
Species
SizeLarge Cabinet
Dimensions18.0 x 16.0 x 6.0 cm
Locality
SKU8311351
Listed on05/06/2026
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