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
San Antonio Mine, East Camp, Santa Eulalia Mining District, Aquiles Serdán 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 San Antonio Mine, East Camp, Santa Eulalia Mining District, Aquiles Serdán Municipality, Chihuahua, Mexico
Data Identifiers
Mindat Occurrence Record ID:702558
Long-form Identifier:1:3:702558:7
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
55.3km (34.4 miles) ⓘSierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
60.4km (37.5 miles) ⓘNopal No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
62.9km (39.1 miles) ⓘPuerto No. 3 mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
63.2km (39.3 miles) ⓘMargaritas No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Aldama Municipality, Chihuahua, Mexico
89.2km (55.4 miles) ⓘNaica Mine, Naica, Saucillo Municipality, Chihuahua, Mexico
References
Megaw, P.K.M. (1990) Geology and geochemistry of the Santa Eulalia mining district, Chihuahua, Mexico. PhD Thesis, University of Arizona, 461 pages.p.549 - p
 
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