Loretto Mine Minerals in the
A. E. Seaman Mineral Museum

Michigan Technological University

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Calcite crystals on pyrite. (10 cm) (CHB74)
Loretto mine, Dickinson County, Michigan.
John A. Jaszczak photo.

Irridescent Chalcopyrite (CHB24) (10 cm view)
Loretto mine, Dickinson County, Michigan.
John A. Jaszczak photo.

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