Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Oligoclase from
Silver Dollar Mine, Custer Mining District, Custer County, South Dakota, USA


Locality type:Mine
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oligoclase data
Locality Data:Click here to view Silver Dollar Mine, Custer Mining District, Custer County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:383279
Long-form Identifier:1:3:383279:0
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
3.4km (2.1 miles) ⓘRuby Reef Claims (Ruby Reef; Ruby Reef No. 1), Custer Mining District, Custer County, South Dakota, USA
3.5km (2.1 miles) ⓘJack Rabbit Mine, Custer Mining District, Custer County, South Dakota, USA
9.2km (5.7 miles) ⓘAnn Mine (Gladys Wells Mine; Gladys Nells Mine on the Map), Custer Mining District, Custer County, South Dakota, USA
10.4km (6.4 miles) ⓘHofert Arcade (Victory No. 1 Prospect), Custer Mining District, Custer County, South Dakota, USA
22.6km (14.0 miles) ⓘDike Lode, Keystone Mining District, Pennington County, South Dakota, USA
79.8km (49.6 miles) ⓘRough and Ready mine, Tinton Pegmatite Mining District, Lawrence County, South Dakota, USA
80.5km (50.0 miles) ⓘGiant-Volney mine, Tinton Pegmatite Mining District, Lawrence County, South Dakota, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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