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Grunerite from
Grand Junction and Hartford Group, Unorganized mining district [1], Custer County, South Dakota, USA


Classification
Species:Grunerite
Formula:◻Fe22+Fe52+(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Grunerite data
Locality Data:Click here to view Grand Junction and Hartford Group, Unorganized mining district [1], Custer County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:765855
Long-form Identifier:1:3:765855:6
GUID (UUID V4):0
Nearest other occurrences of Grunerite
18.9km (11.7 miles) ⓘBeecher No. 3, Beecher Lode, Custer, Custer Mining District, Custer County, South Dakota, USA
21.8km (13.5 miles) ⓘEdison Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
56.9km (35.3 miles) ⓘHomestake Mine, Lead, Lead Mining District, Lawrence County, South Dakota, USA
References
USGS Prof Paper 297F
 
and/or  
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