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USA | |
| Glover, S.L. (1949) Origin and Occurrence of Gem Stones in Washington. Report of Investigations No. 16., Division of Mines and Geology, Department of Conservations and Development. |
| Micro Probe Volume VII Number 5 Spring 1992 |
| Micro Probe Vol. 7 No. 5 Spring '92 |
| Derkey, Robert E., Joseph, Nancy L., Lasmanis, Raymond (1990, November) Metal Mines of Washington - Preliminary Report. Open File Report 90-18. Washington Division of Geology and Earth Resources Derkey, Robert E., Joseph, Nancy L., Lasmanis, Raymond (1990, November) Metal Mines of Washington - Preliminary Report. Open File Report 90-18. Washington Division of Geology and Earth Resources |
| Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA. |