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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Quartz from
Casayo mines (Casaio mines; Valborraz mines), Carballeda de Valdeorras, Valdeorras, Ourense, Galicia, Spain


Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Casayo mines (Casaio mines; Valborraz mines), Carballeda de Valdeorras, Valdeorras, Ourense, Galicia, Spain
Data Identifiers
Mindat Occurrence Record ID:693644
Long-form Identifier:1:3:693644:0
GUID (UUID V4):0
Nearest other occurrences of Quartz
3.8km (2.4 miles) ⓘLa Baña Lake (Lago de la Baña), La Baña, Peña Trevinca, Encinedo, León, Castile and Leon, Spain
4.2km (2.6 miles) ⓘTres Amigos mine, Carballeda de Valdeorras, Valdeorras, Ourense, Galicia, Spain
23.7km (14.7 miles) ⓘPenouta mines, Viana do Bolo, Ourense, Galicia, Spain
34.9km (21.7 miles) ⓘCurrito Mine, Cadafresnas, Corullón, Castile and Leon, Spain
38.3km (23.8 miles) ⓘCoto Vivaldi mine, Congosto, El Bierzo, León, Castile and Leon, Spain
38.4km (23.9 miles) ⓘCalabor mines, Calabor, Pedralba de la Praderia, Zamora, Castile and Leon, Spain
39.5km (24.5 miles) ⓘVale da Formiga Mine, França, Bragança, Bragança, Portugal
40.3km (25.1 miles) ⓘPortelo Mine, França, Bragança, Bragança, Portugal
41.5km (25.8 miles) ⓘPortas del Sil Au deposit, Ribas de Sil, Quiroga, Lugo, Galicia, Spain
42.5km (26.4 miles) ⓘMonte da Gandeira e Serra das Barreiras Brancas Mines, Aveleda e Rio de Onor, Bragança, Bragança, Portugal
References
Calvo Rebollar, Miguel. (2009). Minerales y Minas de España. Vol. IV. Óxidos e hidróxidos. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 751 págs.
Borrajo, Iñigo; Tornos, Fernando; Stein, Holly; Hanchar, John M. (2024) Geochronology and decoupling controls of Sn-(Ta-Li) and W-(Sn) mineralization in the Iberian Variscan Massif, Spain and Portugal. Ore Geology Reviews, 173. 106253 doi:10.1016/j.oregeorev.2024.106253
 
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