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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Topaz from
Segura Mines (Segura mining field), União das Freguesias de Zebreira e Segura, Idanha-a-Nova, Castelo Branco, Portugal


Locality type:Mine
Classification
Species:Topaz
Formula:Al2(SiO4)(F,OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Topaz data
Locality Data:Click here to view Segura Mines (Segura mining field), União das Freguesias de Zebreira e Segura, Idanha-a-Nova, Castelo Branco, Portugal
Data Identifiers
Mindat Occurrence Record ID:942406
Long-form Identifier:1:3:942406:7
GUID (UUID V4):0
Nearest other occurrences of Topaz
1.3km (0.8 miles) ⓘCerro Queimado, União das Freguesias de Zebreira e Segura, Idanha-a-Nova, Castelo Branco, Portugal
63.8km (39.6 miles) ⓘLa Canalita Sn-rich pegmatitic dykes, Peñaparda, Salamanca, Castile and Leon, Spain
64.3km (40.0 miles) ⓘVillasrubias project, Villasrubias, Salamanca, Castile and Leon, Spain
73.5km (45.7 miles) ⓘCovão quarry, Vela, Guarda, Guarda, Portugal
73.7km (45.8 miles) ⓘVela Nordeste quarry, Vela, Guarda, Guarda, Portugal
74.2km (46.1 miles) ⓘAlvarrões Mine, Gonçalo, Guarda, Guarda, Portugal
74.7km (46.4 miles) ⓘBarroca Grande Mine, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Portugal
98.6km (61.3 miles) ⓘCastillejo de Dos Casas, Aldea del Obispo, Salamanca, Castile and Leon, Spain
References
Neiva, A. M. R., Silva, M. M. V. G., Antunes, I. M. H. R., Ramos, J. M. F. (2001) Phosphate minerals of some granitic rocks and associated quartz veins from Northern and Central Portugal. Journal of the Czech Geological Society, 46 (1-2) 35-44
Antunes, Isabel Margarida Horta Ribeiro, Neiva, Ana Margarida Ribeiro, Ramos, João Manuel Farinha, Silva, Paulo Bravo, Silva, Maria Manuela Vinha Guerreiro, Corfu, Fernando (2013) Petrogenetic links between lepidolite-subtype aplite-pegmatite, aplite veins and associated granites at Segura (central Portugal) Geochemistry, 73 (3) 323-341 doi:10.1016/j.chemer.2012.12.003
Gaspar, Miguel, Grácio, Nuno, Salgueiro, Rute, Costa, Mafalda (2022) Trace Element Geochemistry of Alluvial TiO2 Polymorphs as a Proxy for Sn and W Deposits. Minerals, 12 (10) 1248 doi:10.3390/min12101248
 
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