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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Mica Group from
Caballo Alba hyperalkaline playa-lake, Segovia, Castile and Leon, Spain


Locality type:Lake
Classification
Species:'Mica Group' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Mica Group data
Locality Data:Click here to view Caballo Alba hyperalkaline playa-lake, Segovia, Castile and Leon, Spain
Data Identifiers
Mindat Occurrence Record ID:1675702
Long-form Identifier:1:3:1675702:0
GUID (UUID V4):0
Nearest other occurrences of Mica Group
1.2km (0.8 miles) ⓘUnnamed clay quarry, Segovia, Castile and Leon, Spain
5.3km (3.3 miles) ⓘLas Eras, Segovia, Castile and Leon, Spain
5.4km (3.4 miles) ⓘBodón Blanco hyperalkaline playa-lake, Segovia, Castile and Leon, Spain
References
Buey, Pablo, Sanz-Montero, María Esther, Rodríguez-Aranda, Juan Pablo, Sánchez-Román, Mónica, Nieto, Fernando (2025) The Miocene Source-to-Sink Evolution of Fibrous Clay Minerals in Hyperalkaline Playa-Lakes, Duero Basin (Central Spain). Minerals, 15 (1). doi:10.3390/min15010050
 
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