Copper from Houghton County, Michigan, USA

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An aesthetic grouping of sharply crystallized native copper, this exhibiting twinned tetrahexahedrons. In super condition. The specimen at one time was part of the George B Robbe collection at the Seaman Mineral Museum at Michigan Tech University. George B. Robbe (1884 to 1963) was a Michigan Tech alumnus and mining engineer who worked at the Quincy Mine and later at Bingham Canyon, Utah. He and his wife assembled a significant mineral collection that included both crystallized specimens and lapidary material. After his death, the collection was donated to the A. E. Seaman Mineral Museum in the late 1960s.

Product details

SpeciesCopper

SizeCabinet

Dimensions15.0 x 11.0 x 5.0 cm

Added on04/04/2026

LocalityUSA, Michigan, Houghton County

Current owner

Unknown Owner

Acquired: Oct 2026

Previous owners

Date	Collector	Acquisition price
—	Weinrich Minerals	Not disclosed

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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.

Regional guide