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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Glauconite from
Le Four reef, Le Croisic, Saint-Nazaire, Loire-Atlantique, Pays de la Loire, France


Locality type:Reef
Classification
Species:'Glauconite' (not an IMA approved species)
Formula:K0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Glauconite data
Locality Data:Click here to view Le Four reef, Le Croisic, Saint-Nazaire, Loire-Atlantique, Pays de la Loire, France
Data Identifiers
Mindat Occurrence Record ID:1106380
Long-form Identifier:1:3:1106380:1
GUID (UUID V4):0
Nearest other occurrences of Glauconite
19.7km (12.2 miles) ⓘPointe du Bile beach alluvial deposits, Penestin, Vannes, Morbihan, Brittany, France
23.1km (14.4 miles) ⓘLa Mine d'Or beach alluvial deposits, Penestin, Vannes, Morbihan, Brittany, France
37.3km (23.2 miles) ⓘLa Roussellerie beach alluvial deposits, Saint-Michel-Chef-Chef, Saint-Nazaire, Loire-Atlantique, Pays de la Loire, France
References
Baret, Ch. (1905): Catalogue de la Collection de Minéralogie de la Loire-Inférieure, Muséum de Nantes, 119.
 
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