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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Muscovite from
Casas Novas Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal


Locality type:Mine
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Casas Novas Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
Data Identifiers
Mindat Occurrence Record ID:1972074
Long-form Identifier:1:3:1972074:4
GUID (UUID V4):0
Nearest other occurrences of Muscovite
2.9km (1.8 miles) ⓘTerra das Freiras quarry, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
7.7km (4.8 miles) ⓘSerra dos Monges No. 1 Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
15.2km (9.5 miles) ⓘMonfurado gold prospect, São Cristóvão, Montemor-o-Novo, Évora, Portugal
16.3km (10.1 miles) ⓘPedras Alvas quarry, Nossa Senhora da Vila， Nossa Senhora do Bispo e Silveiras, Montemor-o-Novo, Évora, Portugal
32.2km (20.0 miles) ⓘPedras Pintas Mine, Cortiçadas de Lavre e Lavre, Montemor-o-Novo, Évora, Portugal
46.1km (28.7 miles) ⓘLagoa Salgada deposit, Grândola e Santa Margarida da Serra, Grândola, Setúbal, Portugal
62.8km (39.0 miles) ⓘLousal Mine, Azinheira dos Barros, Grândola, Setúbal, Portugal
72.5km (45.1 miles) ⓘFerrarias e Castelo Mine, Santa Vitória e Mombeja, Beja, Beja, Portugal
74.8km (46.5 miles) ⓘFeitais deposit, Aljustrel Mine, Aljustrel e Rio de Moinhos, Aljustrel, Beja, Portugal
75.3km (46.8 miles) ⓘAlgares deposit, Aljustrel Mine, Aljustrel e Rio de Moinhos, Aljustrel, Beja, Portugal
References
São Pedro, Diogo; Roseiro, José; Pedro, Jorge; Mirão, José; Fuertes-Fuente, Mercedes; Nogueira, Pedro (2026) Decoding Orogenic Gold Mineralization Types During Regional Metamorphic Evolution: Detailed Textural Analysis from a Deposit in the Ossa-Morena Zone (SW Iberia). Minerals, 16 (7). doi:10.3390/min16070709
 
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