Copper Calcite - image 1
Updated 5d ago

Copper Calcite

$14,500.00

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Collector’s EdgeFeatured
753 for sale·296 sold
A fantastic and old-time copper specimen with copper included calcite from the world-famous Keweenaw Peninsula of Michigan. Sharp, gemmy, and lustrous calcite with perfect terminations is nestled amongst an aesthetic display of copper crystals. Displays well from multiple angles and self-standing from photographed angle. In fantastic condition.

Product details

Species
CopperAbout Copper →
SizeSmall Cabinet
Dimensions5.0 x 5.8 x 3.5 cm
Listed on09/25/2025
Locality
USA, Michigan, Keweenaw PeninsulaRegional guide →
SKU65397

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.