Ref.: Rocks & Minerals: 18: 207.
Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, U.S. Bureau of Mines Information Circular 8298: 32 (Table A-1).
Rocks & Minerals: 60: 117.
A beryl mine located in sec. 7, T.4S., R.4E., at Fourmile, SW of Custer. Operated chiefly in the 1940's (WWII).
Mineralization is an irregular, oval, zoned pegmatite body in quartz-mica schist.
Workings include a large open cut.
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Map Reference: 43°42'46"N , 103°41'49"W
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Mineral List:25 entries listed. 19 valid minerals.
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