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
Pinheiro pegmatite, Ferreira de Aves, Sátão, Viseu, Portugal


Locality type:Pegmatite
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 Pinheiro pegmatite, Ferreira de Aves, Sátão, Viseu, Portugal
Data Identifiers
Mindat Occurrence Record ID:1755165
Long-form Identifier:1:3:1755165:4
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.7km (0.4 miles) ⓘPestarenga Mine, Quinta da Madalena, Ferreira de Aves, Sátão, Viseu, Portugal
0.9km (0.6 miles) ⓘQuinta da Carrasqueira de Cima II pegmatite, Ferreira de Aves, Sátão, Viseu, Portugal
1.1km (0.7 miles) ⓘQuinta da Corujeirinha pegmatite, Preguiça Mine, Ferreira de Aves, Sátão, Viseu, Portugal
1.4km (0.9 miles) ⓘQuinta da Carrasqueira de Cima I pegmatite, Preguiça Mine, Ferreira de Aves, Sátão, Viseu, Portugal
1.6km (1.0 miles) ⓘQuinta da Carrasqueira pegmatite, Ferreira de Aves, Sátão, Viseu, Portugal
1.9km (1.2 miles) ⓘQuinta da Carrasqueira de Baixo pegmatite, Ferreira de Aves, Sátão, Viseu, Portugal
2.1km (1.3 miles) ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal
2.6km (1.6 miles) ⓘVigia Mine, U.F. Aguiar da Beira e Coruche, Aguiar da Beira, Guarda, Portugal
4.5km (2.8 miles) ⓘFonte Limeira quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
5.9km (3.6 miles) ⓘRatoeira quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
References
Candeias, Carla; Gomes, Adga; Rocha, Fernando (2025) Assessment of Feldspars from Central Portugal Pegmatites for Sustainable Ceramic Applications. Minerals, 15 (5). doi:10.3390/min15050527
 
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