Chalcocite from selected localities.
USA | |
| U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia Leonhard, A. V. (1886) Notes on the Mineralogy of Missouri. St. Louis Academy of Science Transactions, volume 4, 440-453. |
| Dana 6:1084.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |