South Dakota · Custer County
Producer
Lucky Star Prospect
Custer County, South Dakota, United States
Mica
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USGS source ↗
Commodities
Primary
Mica
Commodity type
N
Deposit
Deposit size
S
Orebody form
BRANCHING DIKE
Materials
Ore minerals
Biotite, Muscovite
Gangue
Albite, Beryl, Quartz, Tourmaline
Geology
Host rock
Pegmatite
Associated rock
Pegmatite · Pegmatite
Economic & production
Development status
Producer
Discovery year
1943
Identification
Deposit ID
10055668
MRDS ID
SD02278
Region
NA
Data score
B
Coordinates
43.74857, -103.61306
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, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7701