Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Søndrestjenn, Birkenes, Agder, Norwayi
Regional Level Types
SøndrestjennLake
BirkenesMunicipality
AgderCounty
NorwayCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
58° 31' 18'' North , 8° 22' 9'' East
Latitude & Longitude (decimal):
58.52180,8.36919
GRN:
N40E04
Type:
Lake
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Rykene647 (2013)20.0km
Birkeland2,254 (2010)22.7km
Fevik4,989 (2014)23.9km
Grimstad9,561 (2017)24.0km
Arendal30,916 (2017)24.4km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Sørlandets GeologiforeningKristiansand46km
Mindat Locality ID:
299706
Long-form identifier:
mindat:1:2:299706:6
GUID (UUID V4):
0
Other Languages:
Norwegian:
Søndrestjenn, Birkenes, Agder, Norge


In the neighborhood of this little lake three pegmatite quarries are located.

Müller et al. (2006) and Ihlen et al. (2001) described the Skåremyr pegmatite quarry = Søndrestjenn 1. Ihlen et al. (2001) describes Skåranelia pegmatite quarry = Søndrestjenn 4.

The coordinates are for the lake.
Coordinates © Kartverket - https://www.kartverket.no

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

3 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ 'K Feldspar'
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
ⓘ Siderophyllite
Formula: KFe2+2Al(Al2Si2O10)(OH)2
ⓘ Siderophyllite var. Magnesium-bearing Siderophyllite
Formula: K(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
ⓘ 'Zinnwaldite'

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘSiderophyllite9.EC.20KFe2+2Al(Al2Si2O10)(OH)2
ⓘvar. Magnesium-bearing Siderophyllite9.EC.20K(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Zinnwaldite'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
Hⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
OOxygen
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
Oⓘ Quartz var. Smoky QuartzSiO2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Alⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
Siⓘ Quartz var. Smoky QuartzSiO2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
Kⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2
CaCalcium
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ SiderophylliteKFe22+Al(Al2Si2O10)(OH)2
Feⓘ Siderophyllite var. Magnesium-bearing SiderophylliteK(Fe2+,Mg)2Al(Si2Al2)O10(OH)2

Localities in this Region

Norway

Other Regions, Features and Areas containing this locality

Baltic Shield (Fennoscandian Shield)Shield
Eurasian PlateTectonic Plate
EuropeContinent
ScandinaviaRegion

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

www.ngu.no (n.d.) http://www.ngu.no/upload/Publikasjoner/Rapporter/2001/2001_044.pdf
www.ngu.no (n.d.) http://www.ngu.no/upload/Publikasjoner/Rapporter/2005/2005_075.pdf
Ihlen P.M., Henderson I., Larsen, R.B., Lynum R. (2001): Potensielle ressurser av kvarts- og feltspatråstoffer på Sørlandet, I: Regional prøvetakning av utvalgte feltspatbrudd i Frolandsområdet. NGU Rapport 2001.044, 46 pp.
Müller, A., Ihlen, P.M., Kronz, A. (2006): Potential resources of quartz and feldspar raw material in Sørland IV: Relationships between quartz, feldspar and mica chemistry and pegmatite type. NGU report 2005.075, 94 pp
Quick NavTopCommoditiesMineral ListRock TypesLocalities in RegionOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 6, 2026 06:55:48 Page updated: August 31, 2025 21:55:14
Go to top of page