Spreustein
A variety of Natrolite
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About Spreustein
Formula:
Na2Al2Si3O10 · 2H2O
Name:
Named by A.G. Werner in 1811 and derived from the German word "spreu" = awn, due to its colour and appearance.
A fine-grained natrolite replacing a hydrothermally altered sodalite and/or nepheline. Not uncommon in some nepheline-syenite pegmatites.
Compare also hydronephelite.
Compare also hydronephelite.
Unique Identifiers
Mindat ID:
32526 (as Spreustein)
2947 (as Natrolite)
2947 (as Natrolite)
Long-form identifier:
mindat:1:1:32526:0 (as Spreustein)
mindat:1:1:2947:2 (as Natrolite)
mindat:1:1:2947:2 (as Natrolite)
Chemistry of Spreustein
Mindat Formula:
Na2Al2Si3O10 · 2H2O
Element Weights:
Synonyms of Spreustein
Common Associates
Associated Minerals Based on Photo Data:
| 13 photos of Spreustein associated with Microcline | K(AlSi3O8) |
| 5 photos of Spreustein associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| 5 photos of Spreustein associated with Zircon | Zr(SiO4) |
| 5 photos of Spreustein associated with Aegirine | NaFe3+Si2O6 |
| 5 photos of Spreustein associated with Böhmite | AlO(OH) |
| 5 photos of Spreustein associated with Sodalite | Na4(Si3Al3)O12Cl |
| 5 photos of Spreustein associated with Berborite | Be2(BO3)(OH,F) · H2O |
| 3 photos of Spreustein associated with Nepheline | Na3K(Al4Si4O16) |
| 3 photos of Spreustein associated with Natrolite | Na2Al2Si3O10 · 2H2O |
| 3 photos of Spreustein associated with Astrophyllite | K2NaFe2+7Ti2[Si4O12]2O2(OH)4F |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Spreustein
mindat.org URL:
https://www.mindat.org/min-32526.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
References for Spreustein
Localities for Spreustein
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Tvedalen, Larvik Commune, Vestfold, Norway