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  2. Flora Haines Loughead - Wikipedia

    en.wikipedia.org/wiki/Flora_Haines_Loughead

    She mined for opals for the rest of her life until her son moved her out of her house on Sagebrush Creek Rd. [7] She became known as the "Opal Queen" owning the Rainbow, Stonetree and Bonanza mines and the "Giant Tree" Opal Claim later renamed the Stone Tree. She sold the latter in about 1918 and concentrated on the Rainbow and Bonanza mines. [8]

  3. Virgin Valley - Wikipedia

    en.wikipedia.org/wiki/Virgin_Valley

    The Opal mines are located in the Northern valley. [1] The Virgin Valley has mines that are rich in opals. The opals were discovered in about 1913. [2] The richest mines were owned by Flora Haines Loughead who had been a writer and a farmer but bought a string of claims after being sent to do a story for the San Francisco Chronicle. [3]

  4. List of mines in California - Wikipedia

    en.wikipedia.org/wiki/List_of_mines_in_California

    Argonaut Mining Company: 1893–1942 registered as California Historical Landmark #786. Golden Fleece Tunnel: Westville: Golden Fleece Mining & Milling Co. Iron Mountain Mine: Redding: Kennedy Mine: Jackson: 1886–1942 South of Sutter Gold Mine Locarno Mine

  5. Mercuryville, California - Wikipedia

    en.wikipedia.org/wiki/Mercuryville,_California

    The mine also bore other minerals including chalcedony, opal, and pyrite. [3] The area has considerable geothermal resources, with active fumaroles and hot springs. Located nearby is the Geysers , the world's largest geothermal energy generation facility that provides 725 megawatts of electricity; it produces enough electricity to power the ...

  6. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    The largest producing mines of Virgin Valley have been the famous Rainbow Ridge, [40] Royal Peacock, [41] Bonanza, [42] Opal Queen, [43] and WRT Stonetree/Black Beauty [44] mines. The largest unpolished black opal in the Smithsonian Institution, known as the "Roebling opal", [45] came out of the tunneled portion of the Rainbow Ridge Mine in ...

  7. Burro Schmidt Tunnel - Wikipedia

    en.wikipedia.org/wiki/Burro_Schmidt_Tunnel

    The historical Burro Schmidt Tunnel is located in the El Paso Mountains of the northern Mojave Desert, in eastern Kern County, southern California. It is a 0.5-mile (0.80 km) mining tunnel dug with hand tools and dynamite over a 38-year period by William "Burro" H. Schmidt (1871–1954). [2] in the El Paso Mountains of eastern California.

  8. Category:Mines in California - Wikipedia

    en.wikipedia.org/wiki/Category:Mines_in_California

    Gold mines in California (25 P) Pages in category "Mines in California" The following 4 pages are in this category, out of 4 total.

  9. Plumas-Eureka State Park - Wikipedia

    en.wikipedia.org/wiki/Plumas-Eureka_State_Park

    California Historical Landmark 723, Johnsville Ski Area, Plumas. Plumas-Eureka State Park is a California state park located in the Sierra Nevada and Cascade Range in Plumas County, California. [2] [3] The park, as a mining museum, shows and protects the history of the active mid-19th-century California Gold Rush mining period.