Hercynite from
USA | |
| Carpenter, A. B., Chalmers, R. A., Gard, J. A., Speakman, K., Taylor, H. F. W. (1966) Jennite, a new mineral. American Mineralogist, 51 (1-2) 56-74 |
| Jahns, Richard Henry & Wright, Lauren A. (1951), Gem and lithium-bearing pegmatites of the Pala district, San Diego County, California. California Division of Mines Special Report 7-A: p. 31. |
Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA