As a public health precaution due to COVID-19, all Smithsonian museums are temporarily closed. We are not announcing a reopening date at this time and will provide updates on our websites and social media.
Pohwat, Paul W. 2012. "Connoisseur's choice: Enargite, Longfellow Mine, Red Mountain District, San Juan County, Colorado." Rocks & Minerals 87 (4):342–351. https://doi.org/10.1080/00357529.2012.690717
Post, Jeffrey E., Wise, Michael A., Feather, R. C., and Pohwat, Paul W. 1998. "The Smithsonian Institution's new hall of geology, gems, and minerals." Rocks and Minerals 73:44–51.