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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Biotite from
Cillarga Quarry, Ponteareas, Pontevedra, Galicia, Spain


Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Cillarga Quarry, Ponteareas, Pontevedra, Galicia, Spain
Data Identifiers
Mindat Occurrence Record ID:1382989
Long-form Identifier:1:3:1382989:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.1km (2.5 miles) ⓘPorriño quarries, Porriño, Pontevedra, Galicia, Spain
15.7km (9.7 miles) ⓘA Franqueira, A Cañiza, Pontevedra, Galicia, Spain
20.3km (12.6 miles) ⓘMount Ermelo, Moaña, Pontevedra, Galicia, Spain
38.5km (23.9 miles) ⓘValdarcas Mine, Covas, Vila Nova de Cerveira, Viana do Castelo, Portugal
39.4km (24.5 miles) ⓘAplito-pegmatitic area, Covas, Vila Nova de Cerveira, Viana do Castelo, Portugal
40.5km (25.2 miles) ⓘPanceiros pegmatite, Campo Lameiro, Pontevedra, Galicia, Spain
43.3km (26.9 miles) ⓘCabanas Mine, Arcozelo, Ponte de Lima, Viana do Castelo, Portugal
50.1km (31.1 miles) ⓘMata da Galinheira Mine, Vila Chã (São João Baptista e Santiago), Ponte da Barca, Viana do Castelo, Portugal
50.6km (31.4 miles) ⓘMonte do Castelo da Pena Mine, Vila Chã (São João Baptista e Santiago), Ponte da Barca, Viana do Castelo, Portugal
52.8km (32.8 miles) ⓘFontao mines, Silleda, Pontevedra, Galicia, Spain
References
Calvo Rebollar, Miguel. (2018). Minerales y Minas de España. Vol. IX. Silicatos. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 767 págs.
 
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