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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Opal from
El Madroñal Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain


Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view El Madroñal Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain
Data Identifiers
Mindat Occurrence Record ID:708056
Long-form Identifier:1:3:708056:2
GUID (UUID V4):0
Nearest other occurrences of Opal
1.1km (0.7 miles) ⓘLos Alisos W Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain
1.8km (1.1 miles) ⓘPeña Mojada Quarry (Los Alisos E Quarry; La Cabrera pluton), Valdemanco, Community of Madrid, Spain
2.5km (1.5 miles) ⓘIsabel Quarry (La Saludadora Quarry; La Cabrera pluton), Valdemanco, Community of Madrid, Spain
6.0km (3.8 miles) ⓘLa Cabrera pluton, La Cabrera, Community of Madrid, Spain
50.5km (31.4 miles) ⓘCasa Montero, Vicálvaro, Madrid, Community of Madrid, Spain
51.6km (32.1 miles) ⓘAlmodóvar Hill, Vicálvaro, Madrid, Community of Madrid, Spain
68.6km (42.6 miles) ⓘMiocene outcrops, Alconada de Maderuelo, Segovia, Castile and Leon, Spain
References
González del Tánago, J., Lozano, R.P., González del Tánago Chanrai, J. (2008) Plutón de La Cabrera. Pegmatitas graníticas y alteraciones hidrotermales. Bocamina: 21: 15-85.
 
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