Calcite from Twin Peaks, Black Hawk Mining District, Big Burro Mountains, Grant County, New Mexico, USA
USA | |
| [Rocks & Minerals Vol 68 March/April 1993 p96] |
New Mexico Bureau of Geology Mineral Museum no. 15628 | |
[Rocks & Minerals Vol 68 March/April 1993 p96] | |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. |