Clark Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA

Helvite
Clark Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA

Photo: Jasun McAvoy

Latitude: 33°15'47"N
Longitude: 116°56'20"W

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A gem-bearing pegmatite mine located in the NE¼SW¼ sec. 36, T10S, R1W, SBM, 3.3 km (2.1 miles) SSE of Rincon.

References

Rogers, Austin Flint (1910b), Minerals from the pegmatite veins of Rincon, San Diego County, California: Columbia University, School of Mines Quarterly: 31: 217.

Murdoch, Joseph (1946), Progress on revision of Bulletin 113 “Minerals of California,” with notes on some new mineral occurrences: California Division Mines Report 42: 197-198; […(abstract): Geological Society of America Bulletin: 57: 1256]: 198.

Hanley, J. B. (1951), Economic Geology of the Rincon Pegmatites, San Diego County, California. Department of Natural Resources, California Division of Mines, Special Report 7B: 24 pages, illus., maps: 17, 23.

Sinkankas, J. (1959), Gemstones of North America, Vol. 1. Van Nostrand Reinhold, New York, 494 p.

Weber, F. H. (1963a), Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: 100, 106, 114, 213.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 79, 155, 215, 286, 346.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 177, 317, 348, 367, 368, 389, 426.

Fisher, J. (2002), Gem and rare-element pegmatites of southern California. Mineralogical Record: 33: 389-390.

Mineral List

24 entries listed. 13 valid minerals.

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