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
Rasas e Cobalto Mines, Torre e Vila Mou, Viana do Castelo, Viana do Castelo, Portugal


Locality type:Mine
Classification
Species:Cassiterite
Formula:SnO2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Cassiterite data
Locality Data:Click here to view Rasas e Cobalto Mines, Torre e Vila Mou, Viana do Castelo, Viana do Castelo, Portugal
Data Identifiers
Mindat Occurrence Record ID:863714
Long-form Identifier:1:3:863714:7
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
2.3km (1.4 miles) ⓘCruz da Lenta Mine, Nogueira， Meixedo e Vilar de Murteda, Viana do Castelo, Viana do Castelo, Portugal
2.7km (1.6 miles) ⓘMeixedo Mine, Nogueira， Meixedo e Vilar de Murteda, Viana do Castelo, Viana do Castelo, Portugal
3.1km (1.9 miles) ⓘCapela de Nossa Senhora da Rocha Mine, Nogueira， Meixedo e Vilar de Murteda, Viana do Castelo, Viana do Castelo, Portugal
3.8km (2.4 miles) ⓘCalvelo Mine, Nogueira， Meixedo e Vilar de Murteda, Viana do Castelo, Viana do Castelo, Portugal
4.0km (2.5 miles) ⓘBalsas Mine, São Pedro d'Arcos, Ponte de Lima, Viana do Castelo, Portugal
5.2km (3.2 miles) ⓘSerra de Santa Justa No. 2 Mine, São Pedro d'Arcos, Ponte de Lima, Viana do Castelo, Portugal
6.9km (4.3 miles) ⓘSerra D'Arga, Ponte de Lima, Viana do Castelo, Portugal
6.9km (4.3 miles) ⓘEstorãos Mine, Estorãos, Ponte de Lima, Viana do Castelo, Portugal
7.2km (4.5 miles) ⓘUnnamed mine, Estorãos, Ponte de Lima, Viana do Castelo, Portugal
7.6km (4.7 miles) ⓘCachadinhas and Monte do Castelo Mine, Navió e Vitorino dos Piães, Ponte de Lima, Viana do Castelo, Portugal
References
LNEG
 
and/or  
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