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Norway | |
| Copley, P. A. & Gay, P. (1979): Crystallographic studies of some Norwegian aventurinised feldspars by optical, X-ray, and electron optical methods. Norsk Geologisk Tidsskrift, 59: 228-237[ sample from Arendal used in this study] |
| Mason, Anita (1976) The World of Rocks and Minerals. Larousse & Co., Inc., New York. |
| Nordrum, Fred Steinar (2003) Nyfunn av mineraler i Norge 2002-2003 [New finds of minerals in Norway 2002-2003]. Norsk Bergverksmuseum Skrift, 25. 82-89 |
| Mason, Anita (1976) The World of Rocks and Minerals. Larousse & Co., Inc., New York. |
| Larsen, Alf Olav (2023) Solsteinforekomsten i Østerådalen, Tvedestrand, Agder [The sunstone locality in Østerådalen, Tvedestrand, Agder]. Norsk Mineralsymposium 2023, Stathelle. 69-73 Weibye, Paul Christian (1848) Beiträge zur topograpischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde, 22. 465-544 |
Østerådalen, Østerå, Tvedestrand, Agder, Norway