Mason Valley Gem claim, Mason Valley, Banner District, San Diego Co., California, USA
Located near the center W½ of Sec. 3, T14S, R5E, SBM; on the southwest side of Mason Valley, in a ravine on the east side of a small group of hills. Reportedly owned by D. G. Ingraham in 1939. A pegmatite deposit reported to contain lepidolite and tourmaline. The prospect is developed by two small cuts and a short adit. Elevation approx. 2400' AMSL. (Note: The original Township is erroneously described as 13S in the County Report according to the original database entry.)
| Lepidolite|| 'Tourmaline'|
2 entries listed. 1 valid mineral.
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Weber, F. H. (1963), Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 107.
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