Gesvrine, La-Chapelle-sur-Erdre, Nantes, Loire-Atlantique, Pays de Loire, France

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Pegmatite found in 1991 during road works for the A821 highway.

Ref.:
Guiraud R. (2006) La bertrandite retrouvée. Le Cahier des Micomonteurs, 93, 26-33. (in French)

Mineral List:

'Adularia'
Albite
Anatase
'Apatite'

Arsenopyrite
Bertrandite
Muscovite
Quartz

Rutile
'Sagenite'
'Tourmaline'

11 entries listed. 7 valid minerals.

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