Tourmaline from Imperial County, California, USA
USA | |
| Murdoch, Joseph, Webb, Robert W. (1966) Minerals of California, Centennial Volume (1866-1966) - California Division Mines and Geology, Bulletin 189. p.1-559. Kelley, Vincent C. (1936) Occurrence of claudetite in Imperial County, California. American Mineralogist, 21 (2) 136-138 |
| Campbell, Ian & L.A. Wright (1950), Kyanite paragenesis at Ogilby, California: Geological Society of America Bulletin: 61: 1520-1521. Sampson, Reid J. & W. Burling Tucker (1931), Feldspar, silica, andalusite, and cyanite deposits of California: California Mining Bureau. Report 27: 455 Tucker, W. Burling (1926), Imperial, Inyo Counties: California Mining Bureau. Report 22: 269 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |