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


Locality type:Mine
Classification
Species:Arsenopyrite
Formula:FeAsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite 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:693647
Long-form Identifier:1:3:693647:1
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
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
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
43.1km (26.8 miles) ⓘFrança Mines, França, Bragança, Bragança, Portugal
46.2km (28.7 miles) ⓘAlto da Caroceira Mine, Aveleda e Rio de Onor, Bragança, Bragança, Portugal
47.7km (29.7 miles) ⓘLa Campa mine, Santa Eufemia, Folgoso do Courel, Quiroga, Lugo, Galicia, Spain
54.4km (33.8 miles) ⓘCaracocha mine, Riamonte (Riamonte de Abaixo), Cervantes, Os Ancares, Lugo, Galicia, Spain
54.6km (33.9 miles) ⓘLomba Grande Mine, Tuizelo, Vinhais, 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.
Cárdenes, V. (2013). The Valborraz tungsten mine: Description of a potential source of arsenic pollution. Cadernos Lab. Xeolóxico de Laxe Coruña. 2013. Vol. 37, pp. 147 - 162
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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