A Geoscience Digital Image Library

TitleNative copper in volcanic breccia
DescriptionThis sample, from the Calumet-Atecla Mine in Houghton, Michigan, contains native copper (mostly tarnished red-brown) in a volcanic breccia. Native copper was once a major copper ore mineral, but most large deposits have been mined out. A few places, including especially the Upper Peninsula of Michigan, are known for producing spectacular specimens. This specimen is 17 cm across.
LocationUSA ▹ Michigan. Near Houghton. Calumet and Atecla Mines.
PhotographerDarla Sondrol. 2001-06-25.
CollectionUniversity of North Dakota Mineralogy Collection #35.
Key wordsNative copper, volcanic breccia, Michigan, breccia
Tech details584 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number845