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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Feldspar Group from
Borralha Mines, Salto, Montalegre, Vila Real, Portugal


Locality type:Mine
Classification
Species:'Feldspar Group' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Feldspar Group data
Locality Data:Click here to view Borralha Mines, Salto, Montalegre, Vila Real, Portugal
Data Identifiers
Mindat Occurrence Record ID:1992549
Long-form Identifier:1:3:1992549:1
GUID (UUID V4):0
Nearest other occurrences of Feldspar Group
7.8km (4.8 miles) ⓘMonte da Alvorada Mine, Salto, Montalegre, Vila Real, Portugal
9.1km (5.7 miles) ⓘEastern pegmatite, Muro Alto Mine, Anjos e Vilar do Chão, Vieira do Minho, Braga, Portugal
15.1km (9.4 miles) ⓘBorrageiro Mine, Cabril, Montalegre, Vila Real, Portugal
17.4km (10.8 miles) ⓘRibeira de Pena Mining Field, Santa Marinha, Ribeira de Pena, Vila Real, Portugal
18.3km (11.4 miles) ⓘCarris Mines, Cabril, Montalegre, Vila Real, Portugal
20.2km (12.6 miles) ⓘMata da Lapeira Mine, Basto (São Clemente), Celorico de Basto, Braga, Portugal
22.6km (14.1 miles) ⓘDornas Mine, Bouro (Santa Maria), Amares, Braga, Portugal
22.8km (14.2 miles) ⓘRibeira de Sendão Mine, Cibões e Brufe, Terras de Bouro, Braga, Portugal
23.8km (14.8 miles) ⓘTravassos quarry, Vilar da Veiga, Terras de Bouro, Braga, Portugal
24.9km (15.5 miles) ⓘAdória Mining Field, Cerva e Limões, Ribeira de Pena, Vila Real, Portugal
References
Mota, Alexandra; Sant’Ovaia, Helena; Fádon, Oscar; Noronha, Fernando (2026) The Geochemistry of Granites Associated with W-Sn Deposits of North and Central Portugal and Castilla-León in Spain. Minerals, 16 (8). doi:10.3390/min16080823
 
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