South Dakota · Custer County
Past Producer
Blue Bonnet Claim
Custer County, South Dakota, United States
Mica
Beryllium
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USGS source ↗
Commodities
Primary
Mica
Secondary
Beryllium
Commodity type
B
Deposit
Deposit size
S
Materials
Ore minerals
Beryl, Muscovite
Gangue
Albite, Apatite, Biotite, Garnet, Quartz
Geology
Host rock
Quartzite
Associated rock
Pegmatite
Tectonic setting
Southern Black Hills
Alteration
Stained Pale To Ruby Mica
Economic & production
Development status
Past Producer
Identification
Deposit ID
10101677
MRDS ID
D007163
Alternate names
Star Claim
Region
NA
Data score
B
Coordinates
43.74718, -103.52778
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707