Copper, Calcite - image 1

Copper, Calcite

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Copper and calcite, 10.1 cm, from the Quincy mine, Hancock, Houghton County, Michigan. The Quincy mine operated for 97 years (1848–1945), and was named for Quincy, Massachusetts, the home town of some of the investors. Mined to a depth of more than a mile, it produced 424,000 tons of native copper. Specimens of calcite with included copper were highly prized by collectors.

Product details

SpeciesCopper, Calcite
SizeCabinet
Dimensions10.1 cm
Added on02/13/2026
LocalityUSA, Michigan, Quincy Mine
Publications
  • Mineralogical Record Mineral Collection University Of Delaware page 25
Current owner
The Mineralogical Museum, University of Delaware

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Copper
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.
Copper
Regional guide
Copper from Quincy Mine
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Locality guide
Quincy Mine
Quincy Mine, USA — Keweenaw locality famed for native copper in glassy calcite, peach-to-orange inclusions, arborescent copper, and datolite nodules prized by…