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


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Casas Novas Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
Data Identifiers
Mindat Occurrence Record ID:1972011
Long-form Identifier:1:3:1972011:5
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.2km (1.3 miles) ⓘHerdade da Sala quarry, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
2.9km (1.8 miles) ⓘTerra das Freiras quarry, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal
9.5km (5.9 miles) ⓘAlcalainha Mine, Nossa Senhora da Tourega e Nossa Senhora de Guadalupe, Évora, Évora, Portugal
15.2km (9.5 miles) ⓘMonfurado gold prospect, São Cristóvão, Montemor-o-Novo, Évora, Portugal
19.5km (12.1 miles) ⓘHerdade da Safira Mine, Nossa Senhora da Vila， Nossa Senhora do Bispo e Silveiras, Montemor-o-Novo, Évora, Portugal
21.9km (13.6 miles) ⓘCorte Pereiro quarry, Santa Susana, Alcácer do Sal e Santa Susana, Alcácer do Sal, Setúbal, Portugal
33.0km (20.5 miles) ⓘAlvito Mine, Vila Nova de Baronia, Alvito, Beja, Portugal
43.6km (27.1 miles) ⓘBalsa Mine, Santana, Portel, Évora, Portugal
44.4km (27.6 miles) ⓘAlgares Mine, Portel, Portel, Évora, Portugal
56.6km (35.2 miles) ⓘCourela de Santo António quarry, Estremoz, Estremoz, Évora, Portugal
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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