(Cava Grignaschi, Cosasca, Trontano, Val d'Ossola, Verbano-Cusio-Ossola, Piemonte, Italia)
Gneiss quarry, abandoned, with pegmatite dykes.
This locality is located near Domodossola, but incluted in municipality of Trontano.
References:
- Boscardin, M.; Mattioli, G. & Pierini, C. (1982): Mikrolith und Columbite. LAPIS 7 (3), 17-19 [with analysis of one columbite and one pyrochlore group mineral from Grignaschi quarry]
- De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol.
- 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.
Mineral List:29 entries listed. 23 valid minerals.
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