Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Birnessite from
Le Rancié Mine, Sem, Val-de-Sos, Foix, Ariège, Occitanie, France


Locality type:Mine
Classification
Species:Birnessite
Formula:(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Birnessite data
Locality Data:Click here to view Le Rancié Mine, Sem, Val-de-Sos, Foix, Ariège, Occitanie, France
Data Identifiers
Mindat Occurrence Record ID:1662011
Long-form Identifier:1:3:1662011:5
GUID (UUID V4):0
Nearest other occurrences of Birnessite
26.4km (16.4 miles) ⓘBrachy, Esplas-de-Sérou, Saint-Girons, Ariège, Occitanie, France
29.4km (18.3 miles) ⓘCazalas (Casalas), Castelnau-Durban, Saint-Girons, Ariège, Occitanie, France
73.2km (45.5 miles) ⓘManganese Ore Fields, Plateau d'Ambulla (Las Ambollas), Corneilla-de-Conflent, Prades, Pyrénées-Orientales, Occitanie, France
93.2km (57.9 miles) ⓘPlan de Labasse, Nabias, Aure Valley, Hautes-Pyrénées, Occitanie, France
96.5km (60.0 miles) ⓘAure Valley, Hautes-Pyrénées, Occitanie, France
References
Jordi FabreIdentification: XRD
 
and/or  
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