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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
The Monte Cristo Gold Mine (Spanish for Mountain of Christ Gold Mine) is a gold mine in the San Gabriel Mountains near Los Angeles, California, USA. The Monte Cristo Gold Mine is part of the quest for mineral wealth in the San Gabriels. Many of the older tunnels and shafts are closed, and the 100-year-old machinery is no longer in operation.
Collecting drainage in the Iron Mountain Mine. The mine is located at in the Klamath Mountains of Shasta County, about 9 miles northwest of ReddingThe mine area is drained by several creeks which ultimately enter the Spring Creek Reservoir, formed by the Spring Creek Dam, and finally the Keswick Reservoir formed by a dam across the Sacramento River.
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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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