Gadolinite from selected localities.
USA | |
| U.S. Geological Survey,2005,Mineral Resources Data System :U.S. Geological Survey,Reston, Virginia |
| Frondel, C. (1961) Two yttrium minerals; spencite and rowlandite. The Canadian Mineralogist: 6: 576-581.; Landes, K.K. (1932) The Barringer Hill, Texas, pegmatite. The American Mineralogist: 17(8): 381-390. |
Barnes, V. E., Dawson, R. F., & Parkinson, G. A.(1947): Building stones of central Texas: Univ. Texas Bull, 4246, 198. | |
Self-collected by Franklin Roberts.; Arthur Smith, Frank Roberts, Denise Bicknell (2008) Mineral News, 24, #1, 6-7. | |
| R&M 66:3 pp 196-224 |
Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA