South Dakota · Custer County
Past Producer
Dubuque and Royal Flush Claims
Custer County, South Dakota, United States
Beryllium
Mica
Feldspar
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USGS source ↗
Commodities
Primary
Beryllium, Mica, Feldspar
Commodity type
B
Deposit
Deposit size
S
Workings
Surface
Orebody form
DIKELIKE
Materials
Ore minerals
Beryl, Feldspar, Mica
Gangue
Albite, Microcline, Quartz, Tourmaline
Geology
Host rock
Schist,Pegmatite
Associated rock
Pegmatite
Economic & production
Development status
Past Producer
Identification
Deposit ID
10012473
MRDS ID
D008119
Region
NA
Data score
B
Coordinates
43.74135, -103.6939
References
USBM INFO CIRC 7707, P. 118.USGS PP 247, P. 100-101.