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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Siderite from
Ribeira do Mosteiro Mines (Riba de Alva Mines), Poiares, Freixo de Espada à Cinta, Bragança, Portugal


Locality type:Mine
Classification
Species:Siderite
Formula:FeCO3
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Siderite data
Locality Data:Click here to view Ribeira do Mosteiro Mines (Riba de Alva Mines), Poiares, Freixo de Espada à Cinta, Bragança, Portugal
Data Identifiers
Mindat Occurrence Record ID:800232
Long-form Identifier:1:3:800232:7
GUID (UUID V4):0
Nearest other occurrences of Siderite
25.1km (15.6 miles) ⓘBizarril, Vilar Torpim e Colmeal, Figueira de Castelo Rodrigo, Guarda, Portugal
49.2km (30.5 miles) ⓘVárzea de Trevões Mine, U.F S.J.da Pesqueira e Várzea de Trevões, São João da Pesqueira, Viseu, Portugal
65.7km (40.8 miles) ⓘVinheiros Mine, Souto Maior, Sabrosa, Vila Real, Portugal
67.5km (41.9 miles) ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal
69.1km (42.9 miles) ⓘCompanheiro No. 2 quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal
69.8km (43.4 miles) ⓘSítio do Seixo Mine, Galafura e Covelinhas, Peso da Régua, Vila Real, Portugal
76.2km (47.4 miles) ⓘJales Mines (Jales Mining Field), Alfarela de Jales, Vila Pouca de Aguiar, Vila Real, Portugal
77.5km (48.1 miles) ⓘRebentão Mine, Lagares do Estanho Mines, Queiriga, Vila Nova de Paiva, Viseu, Portugal
78.7km (48.9 miles) ⓘSítio do Castelo Mine, Folgosinho, Gouveia, Guarda, Portugal
78.9km (49.0 miles) ⓘBendada Mines, Bendada, Sabugal, Guarda, Portugal
References
Alves, Pedro (n.d.) Personal communication.
 
and/or  
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