Spreustein

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Name:	Named by A.G. Werner in 1811 and derived from the German word "spreu" = awn, due to its colour and appearance.

A variety of Natrolite

A fine-grained natrolite replacing a hydrothermally altered sodalite and/or nepheline. Not uncommon in some nepheline-syenite pegmatites.

Compare also hydronephelite.

Classification of Spreustein
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Other Information
Health Warning:	No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Spreustein
Reference List: - +	Hoffmann, C.A.S (1815): Handbuch der Mineralogie, p.303.
Internet Links for Spreustein
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Localities for Spreustein
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.


Norway
Telemark Porsgrunn Langesundsfjorden Håøya	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p
Klokkerholmen	Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineral.16. p.5
Løvøya (Løvø; Lövö; Lövöe)	Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineral.16. p.5
Østre Brattholmen	Åsheim, A., Berge, S.A. & Larsen, A.O. (2008): Sporelementer i ænigmatitt fra larvik plutonkompleks. Norsk Bergverksmuseum Skrift. 38: 63-65
Mørje Sagåsen (Strandåsen) Saga 1 Quarry	Andersen, F.,Berge, S.A. & Burvald, I. (1996): Die Mineralien des Langesundsfjords und des umgebenden Larvikit-Gebietes, Oslo-Region, Norwegen. MineralienWelt 7(4):21-100
Sagåsen Quarry (Sagasen Quarry; Strandåsen Quarry; Saga 3 Quarry)	Larsen, A.O., Åsheim, A. and Gault, R. A. (2005): Minerals of the eudialyte group from the Sagåsen larvikite quarry, Porsgrunn, Norway. Norsk Bergverksmuseum Skrifter 30: 58-62
Torbjørnsås (Thorbjørnsås) Quarry	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p.
Skien Brennseter Mica Prospect	Larsen, A.O. (1993): Gruver og skjerp i Skien. Stathelle 1993. 72p
Vestfold Larvik Hedrum Lågendalen Bratthagen 1 road cut pegmatites (Bratthagen)	Berge, S. A. (2011): Micheelsenitt-et nytt mineral for Norge. Stein. 8 (2): 12-13
Langesundsfjorden Arøya (Arö; Store Arøya) Leucophanite-locality	Brøgger, W.C.(1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit- und Nephelinsyenite. Zeitschrift fur Kristallographie und Mineralogie 16, XVI, p.257
Arøyskjærene (Arøy skerries) Fredriksen's prospect	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p
Barkevik area Barkevik (Barkevika)	Brøgger, W.C.(1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit- und Nephelinsyenite. Zeitschrift fur Kristallographie und Mineralogie, 16, 663 pp, p. 54
Barkevikskjær	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p
Skutesundskjær (Skudesundskjær)	Andersen, F.,Berge, S.A. & Burvald, I. (1996): Die Mineralien des Langesundsfjords und des umgebenden Larvikit-Gebietes, Oslo-Region, Norwegen. MineralienWelt 7(4):21-100
Teineholmen	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p
Eikaholmen	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p
Helgeroa Salbutangen	Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. p. 65-67
Låven (Skådön; Lamö; Lamanskjaer)	Larsen, A.O. (2006): Låven, et fredet naturminne. Norsk Bergverksmuseum Skrift, 33 : 37-40
Stokkøya (Stokø; Stockö; Stocköe) Hviteberget	Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p.
Vesle Arøya Natrolittodden	Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. p 462
Larvik town	Weibye, P.C. (1848): Beiträge zur topographischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde 22:465-544
Stavern (Fredriksvärn)	Schumacher, C.F (1801): Versuch eines Verzeichnisses der in den Dänisch-Nordischen Staaten sich findenden einfachen Mineralien. Kopenhagen, p 47; Hoffmann, C. A.S. (1815): Handbuch der Mineralogie. Graz und Gerlach, Freiberg
Tvedalen Tuften (Tuften 1 Quarry; Tuften 2 Quarry) A/S Granit Quarry	Nordrum, F. S. (2007): Nyfunn av mineraler i Norge 2006-2007. STEIN 34 (2), 14-26; In collection of Peter Andresen.
Sandefjord Tønsbergfjorden Helgerødskjær	Berge, S. A. & Andersen, F. (2002): Mineralforekomster i Sandefjordområdet. Norsk Bergverksmuseums Skrift. 20, 50-59

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