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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Pyrolusite from
Peștera Vântului (Wind Cave), Șuncuiuș clay mine, Pădurea Craiului Mountains, Bihor County, Romania


Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Peștera Vântului (Wind Cave), Șuncuiuș clay mine, Pădurea Craiului Mountains, Bihor County, Romania
Data Identifiers
Mindat Occurrence Record ID:1287929
Long-form Identifier:1:3:1287929:0
GUID (UUID V4):0
References
Onac, B.P., Pedersen, R.B., Tysseland, M. (1997) Presence of rare-earth elements in black Ferromanganese coatings from Vântului Cave (Romania). Journal of Cave and Karst Studies, 59:3, 128-131.
 
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