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
Pedras do Estanho Mine, Vila Cova-à-Coelheira, Seia, 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 Pedras do Estanho Mine, Vila Cova-à-Coelheira, Seia, Guarda, Portugal
Data Identifiers
Mindat Occurrence Record ID:916709
Long-form Identifier:1:3:916709:4
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
2.9km (1.8 miles) ⓘOlival da Meia Légua Mine, Carragozela e Várzea de Meruge, Seia, Guarda, Portugal
3.9km (2.4 miles) ⓘMalhão Mining Field, Sazes da Beira, Seia, Guarda, Portugal
4.0km (2.5 miles) ⓘSazes da Beira Mines, Sazes da Beira, Seia, Guarda, Portugal
10.0km (6.2 miles) ⓘCorga da Poldrinha Mine, Seixo da Beira, Oliveira do Hospital, Coimbra, Portugal
10.7km (6.6 miles) ⓘCorga Mine, Seixo da Beira, Oliveira do Hospital, Coimbra, Portugal
10.7km (6.7 miles) ⓘTourais-Lages Mining Field, Tourais e Lajes, Seia, Guarda, Portugal
11.6km (7.2 miles) ⓘParanhos Mining Field, Paranhos, Seia, Guarda, Portugal
11.8km (7.4 miles) ⓘPontinha No. 4 quarry, Pinhanços, Seia, Guarda, Portugal
12.1km (7.5 miles) ⓘUrgueiras Mine, Ervedal e Vila Franca da Beira, Oliveira do Hospital, Coimbra, Portugal
13.7km (8.5 miles) ⓘNossa Senhora - Portela - Corga and Fiais do Ervedal Mines, Ervedal e Vila Franca da Beira, Oliveira do Hospital, Coimbra, Portugal
References
LNEG, Siorminp ID 1989Sn
 
and/or  
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