$500Median
608Sold (12 mo)
$70Last sale
Copper
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Copper, 8.9 cm, from the Centennial No. 6 mine, Calumet & Hecla Conglomerate Lode, Calumet, Houghton County, Michigan. The specimen is an example of a rare triple “copper skull”—a copper form that is unique to this area of Michigan. Ex F. John Barlow collection (No. 1368). Illustrated in The F. John Barlow Mineral Collection (1996), page 277. Jeff Scovil photo.
Product details
SpeciesCopper
SizeSmall Cabinet
Dimensions8.9 cm
Added on02/13/2026
LocalityUSA, Michigan, Calumet & Hecla Mine
Publications
- Mineralogical Record Mineral Collections In American Northeast page 278
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | F. John Barlow | Not disclosed |
Learn more
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
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