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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Montmorillonite from
Margaritas No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico


Locality type:Mine
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Margaritas No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
Data Identifiers
Mindat Occurrence Record ID:1623979
Long-form Identifier:1:3:1623979:1
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
0.4km (0.2 miles) ⓘPuerto No. 3 mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
3.7km (2.3 miles) ⓘNopal No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
10.9km (6.8 miles) ⓘSierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
63.2km (39.3 miles) ⓘSan Antonio Mine, East Camp, Santa Eulalia Mining District, Aquiles Serdán Municipality, Chihuahua, Mexico
References
Faudoa-Gómez, Fabián G., Fuentes-Cobas, Luis E., Esparza-Ponce, Hilda E., Canche-Tello, Jesús G., Reyes-Cortés, Ignacio A., Fuentes-Montero, Maria E., Eichert, Diane M., Rodríguez-Guerra, Yair, Montero-Cabrera, Maria-Elena (2024) Geological and Crystallochemical Characterization of the Margaritasite–Carnotite Mineral from the Uranium Region of Peña Blanca, Chihuahua, Mexico. Minerals, 14 (4). 431 doi:10.3390/min14040431
 
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