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
Chafariz Velho Mine, Alcains, Castelo Branco, Castelo Branco, 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 Chafariz Velho Mine, Alcains, Castelo Branco, Castelo Branco, Portugal
Data Identifiers
Mindat Occurrence Record ID:904855
Long-form Identifier:1:3:904855:3
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
8.8km (5.5 miles) ⓘEspadana - Inchidro and Tapada da Vargem Mines, Lardosa, Castelo Branco, Castelo Branco, Portugal
9.4km (5.8 miles) ⓘRoncões and Fonte Serrana Mines, União de Freguesias de Escalos de Cima e Lousa, Castelo Branco, Castelo Branco, Portugal
11.8km (7.3 miles) ⓘMonte das Areias e Vale da Torre Mine, Póvoa de Atalaia e Atalaia do Campo, Fundão, Castelo Branco, Portugal
17.7km (11.0 miles) ⓘTapada dos Carvalhos e Carvalhal Mines, União de Freguesias Idanha-a-Nova e Alcafozes, Idanha-a-Nova, Castelo Branco, Portugal
23.1km (14.4 miles) ⓘMatas da Rainha Mines - Carvoeira e Senhora da Granja, Proença-a-Velha, Idanha-a-Nova, Castelo Branco, Portugal
24.6km (15.3 miles) ⓘEspadanal Mine, União de Freguesias de Pedrogão de S Pedro e Bemposta, Penamacor, Castelo Branco, Portugal
24.6km (15.3 miles) ⓘMonte Queimado Mine, União de Freguesias de Pedrogão de S Pedro e Bemposta, Penamacor, Castelo Branco, Portugal
24.6km (15.3 miles) ⓘCabeço do Seixo Mine, União de Freguesias de Pedrogão de S Pedro e Bemposta, Penamacor, Castelo Branco, Portugal
24.6km (15.3 miles) ⓘMata da Rainha Mine, União de Freguesias de Pedrogão de S Pedro e Bemposta, Penamacor, Castelo Branco, Portugal
24.6km (15.3 miles) ⓘCanchal da Terrinha Mine, Penamacor, Penamacor, Castelo Branco, Portugal
References
LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 1942Sn
 
and/or  
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