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Cignana Lake (Tsignanaz Lake), Valtournanche, Valtournanche Valley, Aosta Valley, Italy

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Name(s) in local language(s): Lago Cignana (Lac de Tsignanaz), Valtournanche, Valle di Valtournanche, Valle d'Aosta, Italia
Outcrops of rocks of an ultrahigh pressure (UHP) unit, consisting of a basement of glaucophane eclogites and of a metasedimentary cover series, in which is included a Mn deposit.
Microdiamonds occur as inclusions within garnets hosted by quartzites.

Mineral List

21 entries listed. 16 valid minerals.

The above list 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.


- Reinecke, T. (1989): Mg-P-Si-rich ardennite: A high-pressure phase in eclogite-facies piemontite quartzites from Cignana, Valtournanche, Western Alps. 3rd Intern. Eclogite Conf., Würzburg, Germany, April 1989, 20-21.
- Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
- Frezzotti, M. L. (2011): Nature Geoscience.
- Elements 9 (2013) p. 475.

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