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Opal Hill Mine, Mule Mountains District (Hodges Mountain District), Mule Mts (Palo Verde Mts), Riverside Co., California, USA

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Latitude & Longitude (WGS84): 33° 27' 5'' North , 114° 51' 55'' West
Latitude & Longitude (decimal): 33.45147, -114.86543

A semiprecious gemstone (fire agate)-zeolites occurrence/mine located 7.2 km (4.4 miles) SSW of the Mule Mountains (coordinates of record), along the S canyon wall of Coon Hollow (pass).

Workings include surface openings (the topo map reflects 1 open cast mine symbol labeled "Opal Hill Mine" at this point.

Mineral List

7 valid minerals.

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.


Perry, L. (1976a), The Opal Hill Fire Agate Mine: Gems and Minerals: No. 461: 56, 57, 77.

Tschernich, R. W. (1992): Zeolites of the world. Geoscience Press, Phoenix, Arizona: 135.

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