Tourmaline from selected localities.
USA | |
| Cannon, B. (1975): Minerals of Washington, p.38 |
| Derkey, R., Joseph, N., Lasmanis, R. (1990) Metal Mines of Washington-Preliminary Report. Washington Division of Geology and Earth Resources Open File Report 90-18, Washington State Department of Natural Resources, 277 pages. |
| Cannon, B. (1975): Minerals of Washington, p.62; Lasmanis, R. Et Al (1990): Metal Mines of Washington-Preliminary Report |
Una Mine, Miller River Mining District, King County, Washington, USA