Schist from
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Olson, J. C., Hinrichs, E.N. (1960) Beryl-bearing Pegmatites in the Ruby Mountains and Other Areas in Nevada and Northwestern Arizona. Contributions to Economic Geology, United States Department of the Interior, Geological Survey Bulletin 1082-D, 200 pages. | |
| geoscience.unlv.edu (2004) http://geoscience.unlv.edu/pub/rowland/Virtual/geology.html |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |