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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Gypsum from
Las Eras, Segovia, Castile and Leon, Spain


Locality type:Lake
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Las Eras, Segovia, Castile and Leon, Spain
Data Identifiers
Mindat Occurrence Record ID:1504909
Long-form Identifier:1:3:1504909:4
GUID (UUID V4):0
Nearest other occurrences of Gypsum
5.3km (3.3 miles) ⓘCaballo Alba hyperalkaline playa-lake, Segovia, Castile and Leon, Spain
9.2km (5.7 miles) ⓘBodón Blanco hyperalkaline playa-lake, Segovia, Castile and Leon, Spain
94.4km (58.7 miles) ⓘMiocene outcrops, Alconada de Maderuelo, Segovia, Castile and Leon, Spain
References
Sanz-Montero, M. E., Cabestrero, Ó., & Sánchez-Román, M. (2019). Microbial Mg-rich carbonates in an extreme alkaline lake (Las Eras, Central Spain). Frontiers in microbiology, 10, 148.
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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