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Chalcopyrite with sphalerite

Raines, Ed
Mines Museum of Earth Science
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Abstract
Dull, brassy chalcopyrite crystals on resinous brown to darker brown sphalerite. Some of the sphalerite exhibits twinning according to the spinel law, some of which has a polysynthetic habit. This mineral specimen is from the Creede mining district, Colorado.
For more information about the Minerals of Creede, Colorado and the collection, see: http://libguides.mines.edu/GeologyMuseum/digitalcollectionsCreede.
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