Copper (twinned) - image 1

Copper (twinned)

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Copper (twinned), 16.5 cm, from the Keweenaw Peninsula, Michigan.

Product details

SpeciesCopper
SizeLarge Cabinet
Dimensions16.5 cm
Added on02/13/2026
LocalityUSA, Michigan, Keweenaw Peninsula
Publications
  • Mineralogical Record Mineral Collection University Of Delaware page 53
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 Keweenaw Peninsula, Michigan, USA
Keweenaw Peninsula copper - classic native copper from Michigan, famed for wiry arborescent sprays, sharp crystal faces, and historic mines prized by collector…
Locality guide
Keweenaw Peninsula
A collector's guide to Keweenaw Peninsula, USA: its geology, mining history and notable minerals, illustrated with the 209 specimens documented from this locality on EarthWonders.