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
Arreigada Mine, Cinco Vilas e Reigada, Figueira de Castelo Rodrigo, Guarda, 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 Arreigada Mine, Cinco Vilas e Reigada, Figueira de Castelo Rodrigo, Guarda, Portugal
Data Identifiers
Mindat Occurrence Record ID:914866
Long-form Identifier:1:3:914866:6
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
2.0km (1.3 miles) ⓘVale da Ursa Mine, Cinco Vilas e Reigada, Figueira de Castelo Rodrigo, Guarda, Portugal
2.3km (1.4 miles) ⓘNave do Barrocal Mine, Cinco Vilas e Reigada, Figueira de Castelo Rodrigo, Guarda, Portugal
3.8km (2.4 miles) ⓘRetorta Mine, Cinco Vilas e Reigada, Figueira de Castelo Rodrigo, Guarda, Portugal
7.9km (4.9 miles) ⓘFonte Salgueiro and Ladeira das Vinhas Mines, Pereiro, Pinhel, Guarda, Portugal
10.1km (6.3 miles) ⓘTerruco Mine, Malpartida e Vale de Coelha, Almeida, Guarda, Portugal
10.2km (6.3 miles) ⓘChafariz Novo Mine, Almofala e Escarigo, Figueira de Castelo Rodrigo, Guarda, Portugal
13.7km (8.5 miles) ⓘMari Tere mine, Lumbrales, Salamanca, Castile and Leon, Spain
17.0km (10.5 miles) ⓘVale do Vinagre and Caiporotos Mines, Pala, Pinhel, Guarda, Portugal
17.2km (10.7 miles) ⓘBajoca pegmatite, Algodres， Vale de Afonsinho e Vilar de Amargo, Figueira de Castelo Rodrigo, Guarda, Portugal
19.9km (12.4 miles) ⓘCastillejo de Dos Casas, Aldea del Obispo, Salamanca, Castile and Leon, Spain
References
LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1520Sn
 
and/or  
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