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
Almodóvar Hill, Vicálvaro, Madrid, Community of Madrid, Spain


02997090017364452311554.jpg
Opal

Almodóvar Hill, Vicálvaro, Madrid, Community of Madrid, Spain
02997090017364452311554.jpg
Opal

Almodóvar Hill, Vicálvaro, Madrid, Community of Madrid, Spain
00387450017272054115719.jpg
Opal

Almodóvar Hill, Vicálvaro, Madrid, Community of Madrid, Spain
Locality type:Hill
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 Almodóvar Hill, Vicálvaro, Madrid, Community of Madrid, Spain
Data Identifiers
Mindat Occurrence Record ID:951248
Long-form Identifier:1:3:951248:1
GUID (UUID V4):0
Nearest other occurrences of Opal
6.5km (4.0 miles) ⓘCasa Montero, Vicálvaro, Madrid, Community of Madrid, Spain
50.6km (31.4 miles) ⓘPeña Mojada Quarry (Los Alisos E Quarry; La Cabrera pluton), Valdemanco, Community of Madrid, Spain
50.7km (31.5 miles) ⓘLos Alisos W Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain
51.6km (32.1 miles) ⓘEl Madroñal Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain
52.7km (32.7 miles) ⓘIsabel Quarry (La Saludadora Quarry; La Cabrera pluton), Valdemanco, Community of Madrid, Spain
55.2km (34.3 miles) ⓘLa Cabrera pluton, La Cabrera, Community of Madrid, Spain
References
Calvo Rebollar, Miguel (2016) Minerales y Minas de España - Vol. VIII. Cuarzo y otros minerales de la sílice. Fundación Gómez Pardo, Escuela Técnica Superior de Ingenieros de Minas de Madrid. 399pp.
 
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