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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Plagioclase from
Otero de Herreros area, Segovia, Castile and Leon, Spain


Locality type:Deposit
Classification
Species:'Plagioclase' (not an IMA approved species)
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Plagioclase data
Locality Data:Click here to view Otero de Herreros area, Segovia, Castile and Leon, Spain
Data Identifiers
Mindat Occurrence Record ID:1992744
Long-form Identifier:1:3:1992744:4
GUID (UUID V4):0
Nearest other occurrences of Plagioclase
15.4km (9.6 miles) ⓘLa Primera Mine (Cabeza Líjar), Guadarrama, Community of Madrid, Spain
36.2km (22.5 miles) ⓘLas Cabañuelas Mine (El Canchal Mine), Hoyo de Manzanares, Community of Madrid, Spain
51.3km (31.8 miles) ⓘLa Cabrera pluton, La Cabrera, Community of Madrid, Spain
61.7km (38.3 miles) ⓘMadrid meteorite, Madrid, Community of Madrid, Spain
63.0km (39.2 miles) ⓘLa Garita Stream, Horcajuelo de la Sierra, Community of Madrid, Spain
91.9km (57.1 miles) ⓘVillafranca de la Sierra quarry, Villafranca de la Sierra, Ávila, Castile and Leon, Spain
References
Mota, Alexandra; Sant’Ovaia, Helena; Fádon, Oscar; Noronha, Fernando (2026) The Geochemistry of Granites Associated with W-Sn Deposits of North and Central Portugal and Castilla-León in Spain. Minerals, 16 (8). doi:10.3390/min16080823
 
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