MF98AC2: Copper - Calumet No. 1 Mine, Michigan USA
Copper

Calumet No. 1 Mine, Calumet Township, Houghton County, Michigan  USA

Specimen size: 29 × 11.3 × 2.2 cm = 11.4” × 4.4” × 0.9”
Main crystal size: 4.5 × 2 cm = 1.8” × 0.8”

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