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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Glaucodot from
Casas Novas Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal


Locality type:Mine
Classification
Species:Glaucodot
Formula:(Co0.50Fe0.50)AsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Glaucodot data
Locality Data:Click here to view Casas Novas Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
Data Identifiers
Mindat Occurrence Record ID:1972032
Long-form Identifier:1:3:1972032:8
GUID (UUID V4):0
References
São Pedro, Diogo; Roseiro, José; Pedro, Jorge; Mirão, José; Fuertes-Fuente, Mercedes; Nogueira, Pedro (2026) Decoding Orogenic Gold Mineralization Types During Regional Metamorphic Evolution: Detailed Textural Analysis from a Deposit in the Ossa-Morena Zone (SW Iberia). Minerals, 16 (7). doi:10.3390/min16070709
 
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