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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Biotite from
Quartz Mountain, Greer County, Oklahoma, USA


Locality type:Mountain
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Quartz Mountain, Greer County, Oklahoma, USA
Data Identifiers
Mindat Occurrence Record ID:205416
Long-form Identifier:1:3:205416:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
5.3km (3.3 miles) ⓘGovernment quarry (Lugert granite quarry), Lugert, Kiowa County, Oklahoma, USA
6.0km (3.7 miles) ⓘGranite Mountains, Lugert, Kiowa County, Oklahoma, USA
8.7km (5.4 miles) ⓘWillis Granite Company Quarry, Granite, Greer County, Oklahoma, USA
40.0km (24.8 miles) ⓘOtter Creek Valley Deposit, Kiowa County, Oklahoma, USA
68.8km (42.7 miles) ⓘHazel Quarry, Meers, Comanche County, Oklahoma, USA
References
R&M 72:4 pp 252-264
 
and/or  
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