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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Greywacke from
El Cubito Mine (Grupo minero Las Españas), Carrascal de Barregas, Salamanca, Castile and Leon, Spain


Locality type:Mine
Classification
Type:Greywacke
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Greywacke data
Locality Data:Click here to view El Cubito Mine (Grupo minero Las Españas), Carrascal de Barregas, Salamanca, Castile and Leon, Spain
Data Identifiers
Mindat Occurrence Record ID:1809104
Long-form Identifier:1:3:1809104:3
GUID (UUID V4):0
Nearest other occurrences of Greywacke
35.4km (22.0 miles) ⓘLos Santos W deposit, Los Santos, Salamanca, Castile and Leon, Spain
75.7km (47.0 miles) ⓘBarquilla Sn-Ge-Cd-Cu-Fe Deposit, Villar de la Yegua, Salamanca, Castile and Leon, Spain
87.6km (54.5 miles) ⓘVillasrubias project, Villasrubias, Salamanca, Castile and Leon, Spain
88.0km (54.7 miles) ⓘRibeira do Mosteiro Mines (Riba de Alva Mines), Poiares, Freixo de Espada à Cinta, Bragança, Portugal
89.0km (55.3 miles) ⓘLa Canalita Sn-rich pegmatitic dykes, Peñaparda, Salamanca, Castile and Leon, Spain
References
Bermejo, Daniel; Ortega, Lorena; Barrios Sánchez, Santos; Tavazzani, Lorenzo; Castiñeiras, Pedro; Chelle-Michou, Cyril; Crespo, Elena; dos Santos Alves, Kelvin; Gómez-Barreiro, Juan (2025) Late Variscan tectonic orogenic collapse as a trigger for Sn-W mineralizing systems. U-Pb ore geochronology across the Martinamor gneissic dome (Salamanca, Spain). Ore Geology Reviews, 184. 106762 doi:10.1016/j.oregeorev.2025.106762
 
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