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Copper (twinned)
Copper (twinned), 15.2 cm, from the Quincy mine, Hancock, Houghton County, Michigan. The specimen was once owned by Baroness Angela Georgina Burdett-Coutts, later passed to Sir Arthur Russell, George L. English, Lazard Cahn, Northwestern University, Gene Schlepp of Western Minerals, and finally to the University of Delaware.
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Species
Locality
Quincy mine, Hancock, Houghton County, Michigan, Keweenaw Peninsula, Michigan, southern shore of Lake Superior
Publications
- Mineralogical Record Mineral Collection University Of Delaware page 52
Added on02/13/2026
Comments
Known provenance
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