South Dakota · Custer County
Past Producer
Lookout Mine
Custer County, South Dakota, United States
Beryllium
Niobium (Columbium)
Feldspar
Mica
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USGS source ↗
Commodities
Primary
Beryllium, Niobium (Columbium), Feldspar
Tertiary
Mica
Commodity type
B
Deposit
Deposit size
S
Workings
Surface
Orebody form
IRREGULAR
Materials
Ore minerals
Beryl, Columbite, Feldspar, Mica
Gangue
Quartz
Geology
Host rock
Schist
Economic & production
Development status
Past Producer
Identification
Deposit ID
10055781
MRDS ID
SD02533
Region
NA
Data score
C
Coordinates
43.63413, -103.61945
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707, P. 163USBM CIRC 7707, P. 163