Cadalso de los Vidrios, Madrid, Spain

Working granite quarries producing blocks for ornamental uses. Centimetric pegmatite veins occasionally with elongated cavities containing minerals occurs in the quarries.

References:
- Garcia G., Gonzalez C., Bueno A. (2004): Cadalso de los Vidrios (Madrid), Bocamina, n° 14, pp: 12-46

- Menor, C (2007): Kamphaugite-(Y) in Cadalso de los Vidrios (Madrid). Mineral Up, 2007-2, 48-49.

- Prado-Herrero, P.; Garcia-Guinea, J.; Crespo-Feo, E.; Correcher,V. & Menor, C. (2009): First find of Kristiansenite in Spain: Comparison with the type specimen by non-descriptive techniques. Estudos Geológicos 19 (2): 135-139

http://www.bocamina.com/esp/n14/cadalso.pdf