South Dakota · Custer County
Past Producer
Red Spar Mine
Custer County, South Dakota, United States
Feldspar
Beryllium
Mica
⌖ Show on map
USGS source ↗
Commodities
Primary
Feldspar, Beryllium, Mica
Commodity type
B
Deposit
Deposit size
S
Workings
Surface
Orebody form
DIKES
Materials
Ore minerals
Beryl, Feldspar, Mica
Geology
Host rock
Pegmatite
Associated rock
Pegmatite
Structure
The Dikes Form The Point Of A Ridge
Economic & production
Development status
Past Producer
Last production
1945
Identification
Deposit ID
10012472
MRDS ID
D008118
Region
NA
Data score
B
Coordinates
43.69413, -103.72557
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707U.S. BUREAU OF MINES INFO CIRCULAR 7707.