Opal from Los Angeles County, California, USA


USA
California Los Angeles County Acton Mining District Acton Antelope Valley ⓘ Collecting Site Mine	Oakeshott, Gordon Blaisdell (1958) Geology and mineral deposits of San Fernando quadrangle, Los Angeles County, California. California Division of Mines Bulletin 172, 147 pp.
Agoura Hills ⓘ Archstone	MarekC field collection 2014
ⓘ Canwood St construction site 2014	M.Chorazewicz collection
Charter Oak ⓘ Featherstone deposit (Feather-Stone Insulation Company)	Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology, California Division of Mines (Report 50): 50(3&4): No. 144, p. 664. Sampson, Reid J. (1937), Mineral resources of Los Angeles County, California: California Journal of Mines and Geology, California Mining Bureau (Report 33): 33(3): 202
Kagel Canyon ⓘ Katz Diatomaceous Shale prospect	Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology, California Division of Mines (Report 50): 50(3&4): No. 207, p. 688.
Lang ⓘ Tick Canyon	mineralsocal.org
Lomita ⓘ Diatomite deposit	Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282. …(abstract): Geol. Zentralbl., Band 27: 395 (1922): 507 Merrill, Frederick James Hamilton (1916), San Diego, Imperial Counties: Calif. Min Bureau Report 14: 635-743
Los Angeles Hollywood Hills Hollywood Cahuenga Pass Cahuenga Boulevard roadcut ⓘ Neuerberg locality 9	Neuerberg, George Joseph (1951), Minerals of the eastern Santa Monica Mountains, Los Angeles city: American Mineralogist: 36: 156-160.
Malibu Point Dume ⓘ Point Dume deposit	Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology, California Division of Mines (Report 50): 50(3&4): 664.
Palmdale Hunt Canyon ⓘ Unnamed Zeolite occurrence	Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Pemberton, H. Earl and Alexander, G.S. (1968) A new zeolite locality – overlooked 115 years ago. Mineral Explorer 2, 8 pp.: 7 Van Nostrand Reinholt Press: 353-354, 355, 373-374, 376.
Palos Verdes peninsula ⓘ Palos Verdes beach cliffs	Cameron Holden’s collection
Rolling Hills ⓘ Unnamed Diatomaceous Earth quarry	USGS MRDS database (2005). California Division of Mines and Geology, Mineral Information Service: California Mineral Production 1962: 16(11): 11, 13
Rolling Hill Estates ⓘ Dicalite Mine (Walteria; Palos Verde Ranch; Dicalite Company)	Gay, T.E. and Hoffman, S.R. (1954) Mines and mineral deposits of Los Angeles County, California. California Journal of Mines and Geology: 50: No. 143, p. 664. California Journal of Mines and Geology (1937): 33: 201-202
Santa Catalina Island ⓘ Buffalo Springs Weather Station vicinity	Pemberton, H.E. (1983) Minerals of California Bailey, E.H. (1941) Mineralogy, petrology and geology of Santa Catalina Island, California. Ph.D. dissertation (unpublished), Stanford University, Palo Alto, CA., 193 pages, at p.56 and p.75. Van Nostrand Reinholt Press: 422.
ⓘ Santa Cruz offshore basin	Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Fleischer, P. (1972) Sepiolite associated with Miocene diatomite, Santa Cruz basin, California. American Mineralogist: 57: 903-913 Van Nostrand Reinholt Press: 441.

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