The Esmeralda mine is located approximately 2 km west of the Himalaya on a ridge east of Temescal Canyon. This pegmatite was originally prospected by Gail Lewis between 1899 and 1904 with modest success (Jahns and Hanley, 1953). The mine was subsequently taken over by Harry Dougherty, who patented the mine with the Native Gem Mining Co. in 1908, and worked the property until 1909. During this time, the mine produced some fine specimens of morganite and aquamarine and modest amounts of tourmaline of various colors (Sinkankas, 1959). According to Jahns and Hanley (1953), most of the production from the Esmeralda came from one very large pocket found in a section of the dike where the core bulges. Many specimens from this find were sold to museums in the eastern United States and Europe.
References:
Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: pages 89-91.
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Map Reference: 33°13'3"N , 116°49'25"W
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16 entries listed. 9 valid minerals.
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