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
Coiron Plateau, Berzème, Largentière, Ardèche, Auvergne-Rhône-Alpes, France


Locality type:Plateau
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 Coiron Plateau, Berzème, Largentière, Ardèche, Auvergne-Rhône-Alpes, France
Data Identifiers
Mindat Occurrence Record ID:1381269
Long-form Identifier:1:3:1381269:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
10.4km (6.5 miles) ⓘCol de l'Escrinet, Saint-Priest, Privas, Ardèche, Auvergne-Rhône-Alpes, France
54.0km (33.6 miles) ⓘBournac volcano, Saint-Front, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France
67.5km (42.0 miles) ⓘVelay Volcanic Area, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France
73.1km (45.4 miles) ⓘMont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France
88.7km (55.1 miles) ⓘL'Hermitage, Saint-Chamond, Saint-Étienne, Loire, Auvergne-Rhône-Alpes, France
90.2km (56.1 miles) ⓘChardas, Monlet, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France
95.4km (59.3 miles) ⓘPeymartin, La Tour-en-Jarez, Saint-Étienne, Loire, Auvergne-Rhône-Alpes, France
97.2km (60.4 miles) ⓘLe Sauzet, Saint-Héand, Saint-Étienne, Loire, Auvergne-Rhône-Alpes, France
References
 
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