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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Quartz from
Unnamed clay quarry, Segovia, Castile and Leon, Spain


Locality type:Quarry
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Unnamed clay quarry, Segovia, Castile and Leon, Spain
Data Identifiers
Mindat Occurrence Record ID:1675846
Long-form Identifier:1:3:1675846:3
GUID (UUID V4):0
Nearest other occurrences of Quartz
5.6km (3.5 miles) ⓘLas Eras, Segovia, Castile and Leon, Spain
57.3km (35.6 miles) ⓘOtero de Herreros area, Segovia, Castile and Leon, Spain
58.2km (36.2 miles) ⓘLas Suertes quarry, Vegas de Matute, Segovia, Castile and Leon, Spain
59.3km (36.9 miles) ⓘHoya de los Toriles quarry, Villacastín, Segovia, Castile and Leon, Spain
72.3km (44.9 miles) ⓘLa Primera Mine (Cabeza Líjar), Guadarrama, Community of Madrid, Spain
79.5km (49.4 miles) ⓘPepita Prospect, Collado Mediano, Community of Madrid, Spain
82.1km (51.0 miles) ⓘArroyo de la Yedra, Manzanares el Real, Community of Madrid, Spain
83.2km (51.7 miles) ⓘArroyo del Valle, Puerto de la Cruz Verde, San Lorenzo de El Escorial, Community of Madrid, Spain
83.9km (52.1 miles) ⓘCuesta de la Plata Mine (Mónica Mine; Indiana Mine), Bustarviejo, Community of Madrid, Spain
84.1km (52.3 miles) ⓘPuerto de la Cruz Verde Quarries, Zarzalejo, Community of Madrid, 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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