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
Santa Leocádia (Barcos) Mine, U.F Barcos e Santa Leocádia, Tabuaço, Viseu, 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 Santa Leocádia (Barcos) Mine, U.F Barcos e Santa Leocádia, Tabuaço, Viseu, Portugal
Data Identifiers
Mindat Occurrence Record ID:474327
Long-form Identifier:1:3:474327:9
GUID (UUID V4):0
Nearest other occurrences of Cassiterite
7.8km (4.8 miles) ⓘMonte Raso 2 "Covelinhas-Vale de Figueiras", Poiares e Canelas, Peso da Régua, Vila Real, Portugal
9.2km (5.7 miles) ⓘSão Pedro das Águias Mine, U.F Távora e Pereiro, Tabuaço, Viseu, Portugal
11.3km (7.0 miles) ⓘAmeal Mine, U.F Trevões e Espinhosa, São João da Pesqueira, Viseu, Portugal
12.8km (8.0 miles) ⓘQuinta de Roriz Mine, Ervedosa do Douro, São João da Pesqueira, Viseu, Portugal
16.6km (10.3 miles) ⓘCriveiro - Sabrosa and Lagoeiro Mines, Sabrosa, Sabrosa, Vila Real, Portugal
16.8km (10.5 miles) ⓘRibeira de Arcã Mine, São Martinho de Antas e Paradela de Guiães, Sabrosa, Vila Real, Portugal
17.0km (10.5 miles) ⓘSanta Bárbara Mine, Sabrosa, Sabrosa, Vila Real, Portugal
17.0km (10.6 miles) ⓘSenhora da Azinheira Mine, São Martinho de Antas e Paradela de Guiães, Sabrosa, Vila Real, Portugal
17.1km (10.6 miles) ⓘPenedo Redondo Mine, Andrães, Vila Real, Vila Real, Portugal
17.1km (10.6 miles) ⓘPenedo Redondo and Serra da Anta Mine, Constantim e Vale de Nogueiras, Vila Real, Vila Real, Portugal
References
Rui Nunes - 1st August, 2007
 
and/or  
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