Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Pyrolusite from
Real quarry, Real, Penalva do Castelo, Viseu, Portugal


Locality type:Quarry
Classification
Species:Pyrolusite
Formula:Mn4+O2
Comments:Black "manganese dendrites" have never been identified as "pyrolusite". See Potter, R. and Rossman, G, 1979, Mineralogy of Manganese Dendrites and Coatings, American Mineralogist, v. 64, p. 1219-1226.
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Real quarry, Real, Penalva do Castelo, Viseu, Portugal
Data Identifiers
Mindat Occurrence Record ID:271959
Long-form Identifier:1:3:271959:7
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
21.2km (13.2 miles) ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal
65.6km (40.8 miles) ⓘFreixial Mine, Moita, Anadia, Aveiro, Portugal
66.5km (41.3 miles) ⓘBarranco do Linhó (Vales da Cepa e de Enxutos) Mines, Luso, Mealhada, Aveiro, Portugal
67.4km (41.9 miles) ⓘSanta Cristina (Fervença) Mine, Vacariça, Mealhada, Aveiro, Portugal
79.2km (49.2 miles) ⓘVieiro do Almagre Mine, Salvador, Penamacor, Castelo Branco, Portugal
79.2km (49.2 miles) ⓘRibeiro do Souto Mine, Salvador, Penamacor, Castelo Branco, Portugal
References
 
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