Copper replacing Agate - image 1
Photo by J. Jaszczak and C. Stefano

Copper replacing Agate

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Copper replacing agate, 3.5 cm, from the Wolverine #2 mine, Houghton County, Michigan. These unusual agates, unique to the Keweenaw, were discovered only recently. Photo by J. Jaszczak and C. Stefano.

Product details

SpeciesAgate, Copper
SizeMiniature
Dimensions3.5 cm
Added on02/13/2026
LocalityUSA, Michigan, Houghton County
Publications
  • Mineralogical Record Mineral Collections In American Midwest page 210
Current owner
A. E. Seaman Mineral Museum

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Agate
Regional guide
Agate from Houghton County
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Locality guide
Houghton County
Houghton County, USA — a premier copper ore and mineral-specimen locality on Michigan’s Keweenaw, noted for native copper forms, silver, and calcite.