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
Chão das Poldras Mine, Vila Franca da Serra, Gouveia, 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 Chão das Poldras Mine, Vila Franca da Serra, Gouveia, Guarda, Portugal
Data Identifiers
Mindat Occurrence Record ID:915050
Long-form Identifier:1:3:915050:8
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
4.2km (2.6 miles) ⓘCoitada Mine, U.F Juncais， Vila Ruiva e Vila Soeiro do Chão, Fornos de Algodres, Guarda, Portugal
4.3km (2.7 miles) ⓘSalgueiro Mine, Melo e Nabais, Gouveia, Guarda, Portugal
5.7km (3.5 miles) ⓘCasão (no sitio da Pedra Alta) Mine, Melo e Nabais, Gouveia, Guarda, Portugal
6.1km (3.8 miles) ⓘMarés Mine, São Paio, Gouveia, Guarda, Portugal
7.3km (4.5 miles) ⓘA Quinta Mine, Arcozelo, Gouveia, Guarda, Portugal
7.5km (4.7 miles) ⓘMaré Mine, São Paio, Gouveia, Guarda, Portugal
8.1km (5.1 miles) ⓘAlgodres Mining Fied, Algodres, Fornos de Algodres, Guarda, Portugal
8.1km (5.1 miles) ⓘAlgodres Mining Field, Casal Vasco, Fornos de Algodres, Guarda, Portugal
8.1km (5.1 miles) ⓘAlgodres Mining Field, Matança, Fornos de Algodres, Guarda, Portugal
9.6km (6.0 miles) ⓘBoco Mine, Arcozelo, Gouveia, Guarda, Portugal
References
LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 2042Sn
 
and/or  
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