Copper - image 1
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Copper

Unknown Owner
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A wonderful crystallized copper from Michigan’s Keweenaw Peninsula Copper district, showing well-formed twinned tetrahexahedral copper crystals to over 3 cm with good patina. A very three-dimensional copper with great crystals all around.

Product details

Species
CopperAbout Copper →
SizeMiniature
Dimensions3.0 x 5.0 x 4.0 cm
Added on07/16/2026
Locality
USA, Michigan, Keweenaw PeninsulaRegional guide →

Known provenance

DateCollectorAcquisition price
07/2026Unknown OwnerNot disclosed
—Collector’s EdgeNot disclosed

Learn more

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…