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San Nicolás Mine, Valle de la Serena, Badajoz, Extremadura, Spain

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Latitude & Longitude (WGS84): 38° 40' 20'' North , 5° 51' 35'' West
Latitude & Longitude (decimal): 38.67222,-5.85972
Other regions containing this locality:Iberian Peninsula
Köppen climate type:Csa : Hot-summer Mediterranean climate
Name(s) in local language(s):Mina San Nicolás, Valle de la Serena, Badajoz, Extremadura, España

High-temperature quartz veins with Sn-W-Bi-Mo mineralization.
Deposits were mined from 1912 to 1990 in diferent claims (San Nicolás, Galia, Arreglo, Cerrojo and Fraternidad).
World-quality topaz crystals.
Very interesting secondary mineralization from the arsenopyrite-pirite, ferberite-molibdenite veins.

Mineral List

34 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

358.9 - 443.8 Ma

ID: 2502836

Age: Paleozoic (358.9 - 443.8 Ma)

Description: Slate, shale, sandstone, limestone, ampelite and chert

Lithology: Sandstone, slate and limestone

Reference: Mapa Geológico de la Península Ibérica, Baleares y Canarias a escala 1:1.000.000. Instituto Geológico y Minero de España. [77]

443.8 - 485.4 Ma

ID: 3130558
Ordovician quartzite

Age: Ordovician (443.8 - 485.4 Ma)

Description: undifferentiated metamorphic

Lithology: Major:{quartzite}, Minor{shale/slate,greenschist,conglomerate}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

541 - 4000 Ma

ID: 3187988
Precambrian crystalline metamorphic rocks

Age: Precambrian (541 - 4000 Ma)

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
- Calvo, M. (2003): Minerales y Minas de España. Vol. II, Sulfuros. Museo de Ciencias Naturales de Álava, 705 pp.
- Calvo, M. (2009): Minerales y Minas de España. Vol. IV, Óxidos e Hidróxidos. Escuela Técnica Superior de Ingenieros de Minas de Madrid - Fundación Gómez Pardo. 752 pp.
-Sainz de Baranda Graf, B. (2013): El Complejo Minero San Nicolás, Valle de la Serena (Badajoz). Revista de Minerales, V-3

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