Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
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

Grua Tunnel, Grua, Lunner, Akershus, Norwayi
Regional Level Types
Grua TunnelTunnel
GruaVillage
LunnerMunicipality
AkershusCounty
NorwayCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
01797090017271926787527.jpg
Stilbite Subgroup, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
09642060017272034461343.jpg
Sphalerite, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
05801090017361087189686.jpg
Chabazite, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
01797090017271926787527.jpg
Stilbite Subgroup, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
09642060017272034461343.jpg
Sphalerite, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
05801090017361087189686.jpg
Chabazite, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
01797090017271926787527.jpg
Stilbite Subgroup, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
09642060017272034461343.jpg
Sphalerite, etc.

Grua Tunnel, Grua, Lunner, Akershus, Norway
Latitude & Longitude (WGS84):
60° 15' 29'' North , 10° 40' 26'' East
Latitude & Longitude (decimal):
60.25825,10.67410
GeoHash:
G#: u4xwfcstu
GRN:
N41E04
Type:
Tunnel
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Grua1,477 (2013)0.7km
Jevnaker4,308 (2014)16.0km
Maura2,400 (2013)19.7km
Åneby1,373 (2013)21.7km
Gardermoen259 (2015)23.9km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
SteinklubbenSkjetten37km
Mindat Locality ID:
14383
Long-form identifier:
mindat:1:2:14383:0
GUID (UUID V4):
0
Other Languages:
Norwegian:
Gruatunnelen, Grua, Lunner, Akershus, Norge


A 1390 m long road tunnel along RV 4 going under Tveitmarkhøgda, Grua. Many collectable specimens were found during its construction. It was opened in 1992.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


14 valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Habit: acicular
Colour: dark green
Description: Acicular microcrystals in Alpine cleft with epidote, chabazite, magnetite and pyrite.
References:
Former Lennart Närlund collectionIdentified by Harold Moritz: Visual Identification
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ 'Apophyllite Group'
Formula: AB4[Si8O22]X · 8H2O
ⓘ Calcite
Formula: CaCO3
ⓘ 'Chabazite'
ⓘ 'Chlorite Group'
ⓘ Cosalite
Formula: Pb2Bi2S5
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Fluorite
Formula: CaF2
ⓘ Galena
Formula: PbS
References:
Knut Edvard Larsen collection nr 3610Identified by Knut Edvard Larsen: Visual Identification
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Laumontite
Formula: CaAl2Si4O12 · 4H2O
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Habit: massive
Colour: metallic black
Description: Poorly crystallized material in Alpine cleft with epidote, chabazite and pyrite.
References:
Former Lennart Närlund collectionIdentified by Harold Moritz: Visual Identification
ⓘ Natrolite
Formula: Na2Al2Si3O10 · 2H2O
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS
ⓘ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘCosalite2.JB.10Pb2Bi2S5
Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘNatrolite9.GA.05Na2Al2Si3O10 · 2H2O
ⓘLaumontite9.GB.10CaAl2Si4O12 · 4H2O
Unclassified
ⓘ'Apophyllite Group'-AB4[Si8O22]X · 8H2O
ⓘ'Chabazite'-
ⓘ'Chlorite Group'-
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ LaumontiteCaAl2Si4O12 · 4H2O
Hⓘ NatroliteNa2Al2Si3O10 · 2H2O
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Oⓘ CalciteCaCO3
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ LaumontiteCaAl2Si4O12 · 4H2O
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ NatroliteNa2Al2Si3O10 · 2H2O
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ QuartzSiO2
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oⓘ Garnet GroupX3Z2(SiO4)3
FFluorine
Fⓘ FluoriteCaF2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ LaumontiteCaAl2Si4O12 · 4H2O
Alⓘ NatroliteNa2Al2Si3O10 · 2H2O
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ LaumontiteCaAl2Si4O12 · 4H2O
Siⓘ NatroliteNa2Al2Si3O10 · 2H2O
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ QuartzSiO2
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siⓘ Garnet GroupX3Z2(SiO4)3
SSulfur
Sⓘ CosalitePb2Bi2S5
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ CalciteCaCO3
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ FluoriteCaF2
Caⓘ LaumontiteCaAl2Si4O12 · 4H2O
Caⓘ PrehniteCa2Al2Si3O10(OH)2
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
ZnZinc
Znⓘ SphaleriteZnS
PbLead
Pbⓘ CosalitePb2Bi2S5
Pbⓘ GalenaPbS
BiBismuth
Biⓘ CosalitePb2Bi2S5

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
Norway
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

Raade, Gunnar (1993) Two new localities of Cosalite. Mineralogisk-Geologisk Museum - Universitetet i Oslo - Interne notater, Geologisk Museums venner. 177
Wiik, Geir Henning (2012) Møte mellom riksvei 4 og riksvei 35 på grua: Et geologisk veikryss. Norsk Bergverksmuseum Skrift, 49. 125-133
Quick NavTopMineral ListOther 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 1, 2026 03:17:35 Page updated: August 17, 2025 18:42:54
Go to top of page