(Alpe Rosso, Orcesco, Val Vigezzo, Val d'Ossola, Verbano-Cusio-Ossola, Piemonte, Italia)
Above Orcesco village, at an elevation of 1300 m asl, there is an albitite vein that was excavated from 1947 to 1953.
References:
- Boscardin, M.; Mattioli, G. & Pierini, C. (1982): Mikrolith und Columbite. LAPIS 7 (3), 17-19 [ with analysis of 1 columbite and 1 pyrochlore group mineral from Alpe Rosso]
- Callegari A., Mattioli V. (2002). Val Vigezzo: novità mineralogiche. Riv. Miner. Ital., 2: 78-80.
- Guastoni, A., Diella, V. & Pezzotta, F. (2008): Vigezzite and associated oxides of Nb–Ta from emerald-bearing pegmatites of the Vigezzo valley, Western Alps, Italy. Can. Mineral. 46, 619-633.
- Mattioli, V. (1986): Malayait-Kristalle aus dem Val Vigezzo. LAPIS 11 (11), 5
