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
Palhal Mine, Branca, Albergaria-a-Velha, Aveiro, Portugal


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 Palhal Mine, Branca, Albergaria-a-Velha, Aveiro, Portugal
Data Identifiers
Mindat Occurrence Record ID:688972
Long-form Identifier:1:3:688972:2
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
59.3km (36.8 miles) ⓘRegada, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal
70.0km (43.5 miles) ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal
References
Marques de Sá, Joaquin, Lelal Gomes, Carlos (2010) Les mines de cuivre et nickel de Palhal et Telhadela, Albergaria-a-Velha, Aveiro, portugal [The copper and nickel mines of Palhal and Telhadela, Albergaria-a-Velha, Aveiro, Portugal]. Le Règne Minéral, 16 (92) 36-47
 
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