South Dakota · Custer County
Producer
Beecher No. 3
Custer County, South Dakota, United States
Beryllium
Niobium (Columbium)
Tantalum
Mica
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USGS source ↗
Commodities
Primary
Beryllium, Niobium (Columbium), Tantalum, Mica
Commodity type
B
Deposit
Deposit size
S
Materials
Ore minerals
Beryl, Lepidolite, Mica, Spodumene
Geology
Host rock
Pegmatite
Economic & production
Development status
Producer
Identification
Deposit ID
10009679
MRDS ID
D002770
Region
NA
Data score
C
Coordinates
43.73329, -103.50056
References
USGS PROF PAPER 247 PAGE 66, 70 & 71