Thomsonite-Ca from selected localities.
Norway | |
| Svein A. Berge collection 1979; Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp |
| Peter Andresen observation in field sept 2003 |
| Knut Edvard Larsen collection # MM-4101 |