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


Locality type:Mine
Classification
Species:Cassiterite
Formula:SnO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cassiterite 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:256000
Long-form Identifier:1:3:256000:7
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
1.0km (0.6 miles) ⓘFeli deposit, La Fregeneda, Salamanca, Castile and Leon, Spain
3.9km (2.4 miles) ⓘAlberto pit, La Fregeneda, Salamanca, Castile and Leon, Spain
4.8km (3.0 miles) ⓘTumbo de la Caldera pegmatite, La Fregeneda, Salamanca, Castile and Leon, Spain
6.4km (4.0 miles) ⓘHinojosa-Saucelle road, Hinojosa de Duero, Salamanca, Castile and Leon, Spain
11.8km (7.4 miles) ⓘBajoca Mine, Almendra, Vila Nova de Foz Côa, Guarda, Portugal
12.1km (7.5 miles) ⓘBajoca pegmatite, Algodres， Vale de Afonsinho e Vilar de Amargo, Figueira de Castelo Rodrigo, Guarda, Portugal
17.4km (10.8 miles) ⓘAlmendra Mining Field, Almendra, Vila Nova de Foz Côa, Guarda, Portugal
17.7km (11.0 miles) ⓘBarruecopardo Mine, Barruecopardo, Salamanca, Castile and Leon, Spain
18.7km (11.6 miles) ⓘChafariz Novo Mine, Almofala e Escarigo, Figueira de Castelo Rodrigo, Guarda, Portugal
19.3km (12.0 miles) ⓘMari Tere mine, Lumbrales, Salamanca, Castile and Leon, Spain
References
LNEG - Laboratório Nacional de Energia e Geologia, Siorminp database
 
and/or  
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