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Quartzite Mountain Quarry [1] (Quartzite Mtn Quarry; Emsco Quartzite), Quartzite Mountain, Oro Grande District, San Bernardino Co., California, USA

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Latitude & Longitude (WGS84): 34° 37' 30'' North , 117° 15' 58'' West
Latitude & Longitude (decimal): 34.625, -117.266113281

A former silica deposit/mine located in sec. 11, T6N, R4W, SBM, 2.5 km (1.6 miles) NE of Quartzite Mountain (coordinates of record) and 2.9 km (1.8 miles) S of Silver Mountain (coordinates of record). Owned & operated by the Southwestern Portland Cement Company, California (1992). MRDS database stated accuracy for this location is 100 meters.

Local rocks include Carboniferous marine rocks, unit 1 (Western Mojave Desert).

Workings include unspecified surface openings (the USGS MRDS database file infers a quarry operation in its title).

Mineral List

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology, California Division of Mines (Report 49): 49(1-2): tabulated list No. 495, p. 166.

California Division of Mines and Geology (1981), Mines & Mineral Producers Active in California during 1980, Special Publication 58: 50.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10165091.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060711332.

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