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This list of mines in California is subsidiary to the list of mines article and lists working, defunct and future mines in the U.S. state of California. It is organized by the primary mineral output. For practical purposes stone, marble and other quarries may be included in this list.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
Gold mining began at the site in 1936, but the rare earth deposits were not discovered until 1949 when prospectors in search of uranium noticed anomalously high radioactivity. [9] [3] Molybdenum Corporation of America bought most [10] of the mining claims, and began small-scale production in 1952. Mountain Pass mine, mill, shop & offices in 2010
IMC Global (also known as International Minerals and Chemical Corporation and Imcera) was a mining and production company, formerly listed on the S&P MidCap 400. [2] It was founded in 1909 as International Agricultural Corporation. [ 3 ]
Compass Minerals International, Inc is an American public company that, through its subsidiaries, is a leading producer of minerals, including salt, magnesium chloride and sulfate of potash. Based in Overland Park, Kansas ; the company provides bulk treated and untreated highway deicing salt to customers in North America and the United Kingdom ...
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Tobermorite is a calcium silicate hydrate mineral with chemical formula: Ca 5 Si 6 O 16 (OH) 2 ·4H 2 O or Ca 5 Si 6 (O,OH) 18 ·5H 2 O. Two structural varieties are distinguished: tobermorite-11 Å and tobermorite-14 Å. Tobermorite occurs in hydrated cement paste and can be found in nature as an alteration mineral in metamorphosed limestone ...
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