Copper - image 1

Copper

$2,500.00

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C

Collector’s EdgeFeatured
753 for sale·296 sold
A neat etched and wonderfully crystalized (texahetrahedral?) copper crystal from Michigan’s famed copper country. Great for collectors of Michigan minerals, metallics, crystal forms, or all of the above!

Product details

Species
CopperAbout Copper →
SizeSmall Cabinet
Dimensions4.5 x 7.5 x 6.5 cm
Listed on12/24/2025
Locality
USA, Michigan, Keweenaw PeninsulaRegional guide →
SKU83610

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
The Keweenaw Peninsula is the classic native-copper locality: a place where copper was not merely an ore mineral locked in sulfides, but the metal itself—dense, malleable, and often sculptural—precipitated as copper, Cu, in billion-year-old volcanic rocks. For collectors, “Keweenaw copper” is a category unto itself. It can appear as wiry arborescent sprays, thick hackly sheets, crystal groups with sharp metallic faces, rounded glacial float nuggets, massive vein copper, copper-filled amygdules in basalt, and copper in conglomerate where the metal laces between volcanic pebbles.