Chalcocite (copper sulphife). Dull black twinned crystal with white calcite (schiefer spar). Specimen from the Levant mine, St. Just, Cornwall, UK.

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Size: 2733px × 3158px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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