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Tvedestrand, Agder, Norwayi
Regional Level Types
TvedestrandMunicipality
AgderCounty
NorwayCountry

Coat of Arms of TvedestrandFlag of Tvedestrand
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PhotosMapsSearchMineralogy
03633920017271979921476.jpg
The Næs Jernverk Iron Museum

Tvedestrand, Agder, Norway
02282640017271979979723.jpg
Entrance to Solberg iron mine

Solberg iron mines, Holt, Tvedestrand, Agder, Norway
06019870017271980006861.jpg
Fire-setting in the Solberg Mine

Solberg iron mines, Holt, Tvedestrand, Agder, Norway
03633920017271979921476.jpg
The Næs Jernverk Iron Museum

Tvedestrand, Agder, Norway
02282640017271979979723.jpg
Entrance to Solberg iron mine

Solberg iron mines, Holt, Tvedestrand, Agder, Norway
06019870017271980006861.jpg
Fire-setting in the Solberg Mine

Solberg iron mines, Holt, Tvedestrand, Agder, Norway
03633920017271979921476.jpg
The Næs Jernverk Iron Museum

Tvedestrand, Agder, Norway
02282640017271979979723.jpg
Entrance to Solberg iron mine

Solberg iron mines, Holt, Tvedestrand, Agder, Norway
Neighbouring regions:
Froland, Agder, Norway
Arendal, Agder, Norway
Vegårshei, Agder, Norway
Risør, Agder, Norway
Åmli, Agder, Norway
Type:
Municipality
Largest Settlements:
PlacePopulation
Tvedestrand1,975 (2016)
Mindat Locality ID:
12430
Long-form identifier:
mindat:1:2:12430:3
GUID (UUID V4):
0
Other Languages:
View 34 more...
French:
Tvedestrand, Agder, Norvège
German:
Tvedestrand, Agder, Norwegen
Italian:
Tvedestrand, Agder, Norvegia
Norwegian:
Tvedestrand, Agder, Norge
Russian:
Тведестранн, Эуст-Агдер, Норвегия
Simplified Chinese:
特韋德斯特蘭, 阿格德爾, 挪威
Spanish:
Tvedestrand, Reino de Agder, Noruega
Albanian:
Tvedestrand, Aust-Agder, Norvegjia
Asturian:
Tvedestrand, Agder, Noruega
Basque:
Tvedestrand, Aust-Agder, Norvegia
Bavarian:
Tvedestrand, Aust-Agder, Norwegn
Bishnupriya Manipuri:
টভেডেস্ট্রান্ড, ঔস্ট-অগ্দের, নরৱে
Bulgarian:
Тведестран, Ауст-Агдер, Норвегия
Catalan:
Tvedestrand, Aust-Agder, Noruega
Cebuano:
Tvedestrand, Aust-Agder fylke, Norway
Croatian:
Tvedestrand, Aust-Agder, Norveška
Danish:
Tvedestrand, Agder, Norge
Dutch:
Tvedestrand, Agder, Noorwegen
Esperanto:
Tvedestrand, Aust-Agder, Norvegio
Estonian:
Tvedestrandi vald, Agder, Norra
Finnish:
Tvedestrand, Agder, Norja
Georgian:
ტვედესტრანი, ეუსტ-აგდერი, ნორვეგია
Hungarian:
Tvedestrand, Aust-Agder megye, Norvégia
Javanese:
Tvedestrand, Norwégia
Latin:
Tvedestrand, Aust-Agder, Norvegia
Limburgian:
Tvedestrand, Aust-Agder, Noorwege
Lithuanian:
Tvedestrandas, Rytų Agderis, Norvegija
Low Saxon/Low German:
Kommun Tvedestrand, Agder, Norwegen
Malay:
Tvedestrand, Vest-Agder, Norway
Minnan / Hokkien-Taiwanese:
Tvedestrand, Aust-Agder, Lo̍k-ui
Northern Sami:
Tvedestrand, Nuorta-Agdera fylka, Norga
Norwegian (Nynorsk):
Tvedestrand, Agder, Noreg
Occitan:
Tvedestrand, Aust-Agder, Norvègia
Polish:
Tvedestrand, Agder, Norwegia
Portuguese:
Tvedestrand, Aust-Agder, Noruega
Romanian:
Tvedestrand, Aust-Agder, Norvegia
Slovenian:
Tvedestrand, Aust-Agder, Norveška
Swahili:
Tvedestrand, Aust-Agder, Norwei
Swedish:
Tvedestrand, Agder, Norge
Waray:
Tvedestrand, Aust-Agder, Noruega
Welsh:
Tvedestrand, Norwy


The Tvedestrand area are famous for cordierite and sunstone specimens. Especially known is sunstone (aventurine feldspar) from the classical, now abandoned Østerådalen locality, (often labelled just "Tvedestrand"). This sunstone is by some considered to be the best in the world.

There has also been numerous feldspar/quartz quartz quarries in Tvedestrand, but since they were active during the 1800's, they are overgrown and mostly forgotten.

Map studies have resulted in identify some of them with certainty. Others are impossible to trace or need field confirmation. It turns out to be difficult/impossible to identify some of the localities described in old literature.

That implies that the names given to the localities here at Mindat cannot be fully trusted. Further study is required!

NOTE:
While studying old Kristen Dale maps, I found a new unknown locality:
58.63899545469106,8.96012306213379

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

43 valid minerals.

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Description: An analysis of the Sunstone, (aventurine feldspar) showed it to be oligoclase (Webye 1848)
ⓘ 'Allanite Group'
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ 'Amphibole Supergroup'
Formula: AB2C5(T8O22)W2
ⓘ Anthophyllite
Formula: ◻Mg2Mg5(Si8O22)(OH)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
ⓘ Arsenopyrite
Formula: FeAsS
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Localities: Reported from at least 9 localities in this region.
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Cordierite
Formula: Mg2Al4Si5O18
Localities: Reported from at least 8 localities in this region.
ⓘ Cordierite var. Iolite
Formula: (Mg,Fe)2Al3(AlSi5O18)
ⓘ Corundum
Formula: Al2O3
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Dumortierite
Formula: Al(Al2O)(Al2O)2(SiO4)3(BO3)
Description: Intergrown with retrograde alteration of cordierite
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ 'Feldspar Group'
ⓘ 'Feldspar Group var. Sunstone'
ⓘ 'Fergusonite'
Description: Described as "bragit"
ⓘ Gadolinite-(Y) ?
Formula: Y2Fe2+Be2Si2O10
Description: Gadolinite from this locality is mentioned by Scheerer (1843), but Schetelig (1922) believed it to be an allanite.
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Gedrite
Formula: ◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
ⓘ Graphite
Formula: C
Description: Blades up to 2 cm in diametre.
ⓘ Hematite
Formula: Fe2O3
ⓘ Hercynite
Formula: Fe2+Al2O4
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ 'Högbomite Group'
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 6 localities in this region.
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ 'Monazite Group'
Formula: REE(PO4)
Description: Mallard found monazite as inclusions in apatite.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ Native Silver
Formula: Ag
ⓘ Native Sulphur
Formula: S8
Description: One sample in the collection of Mineralogical Museum of Oslo.
ⓘ 'Orthopyroxene Subgroup'
ⓘ Pentlandite
Formula: (NixFey)Σ9S8
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ 'Pinite'
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 10 localities in this region.
ⓘ Rutile
Formula: TiO2
Localities: Reported from at least 7 localities in this region.
ⓘ Rutile var. Ilmenorutile
Formula: (Ti,Nb)O2
ⓘ Samarskite-(Y)
Formula: YFe3+Nb2O8
ⓘ Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
ⓘ 'Scapolite'
ⓘ Sillimanite
Formula: Al2(SiO4)O
ⓘ Spinel
Formula: MgAl2O4
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Thorite
Formula: Th(SiO4)
Description: Brøgger (1906) mentions the find of thorite as "Spuren von Orangit" (traces of Orangite).
ⓘ Thorite var. Orangite
Formula: Th(SiO4)
ⓘ Titanite
Formula: CaTiO(SiO4)
ⓘ Titanite var. Yttrium-bearing Titanite
Formula: (Ca,Y)TiSiO5
ⓘ 'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z
ⓘ Uraninite
Formula: UO2
ⓘ Uraninite var. Thorian Uraninite
Formula: (U,Th)O2
ⓘ Violarite
Formula: Fe2+Ni3+2S4
ⓘ Xenotime-(Y)
Formula: Y(PO4)
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Silver1.AA.05Ag
ⓘGraphite1.CB.05aC
ⓘNative Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘBornite2.BA.15Cu5FeS4
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘViolarite2.DA.05Fe2+Ni3+2S4
ⓘPyrite2.EB.05aFeS2
ⓘArsenopyrite2.EB.20FeAsS
Group 4 - Oxides and Hydroxides
ⓘHercynite4.BB.05Fe2+Al2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘCorundum4.CB.05Al2O3
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘRutile
var. Ilmenorutile		4.DB.05(Ti,Nb)O2
ⓘ4.DB.05TiO2
ⓘSamarskite-(Y)4.DB.25YFe3+Nb2O8
ⓘUraninite
var. Thorian Uraninite		4.DL.05(U,Th)O2
ⓘ4.DL.05UO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
ⓘXenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘThorite
var. Orangite		9.AD.30Th(SiO4)
ⓘ9.AD.30Th(SiO4)
ⓘZircon9.AD.30Zr(SiO4)
ⓘSillimanite9.AF.05Al2(SiO4)O
ⓘTitanite9.AG.15CaTiO(SiO4)
ⓘvar. Yttrium-bearing Titanite9.AG.15(Ca,Y)TiSiO5
ⓘDumortierite9.AJ.10Al(Al2O)(Al2O)2(SiO4)3(BO3)
ⓘGadolinite-(Y) ?9.AJ.20Y2Fe2+Be2Si2O10
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘCordierite9.CJ.10Mg2Al4Si5O18
ⓘvar. Iolite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘDiopside9.DA.15CaMgSi2O6
ⓘAnthophyllite9.DD.05◻Mg2Mg5(Si8O22)(OH)2
ⓘGedrite9.DD.05◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
ⓘSapphirine9.DH.45Mg4(Mg3Al9)O4[Si3Al9O36]
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite
var. Illite		9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5(T8O22)W2
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Monazite Group'-REE(PO4)
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Scapolite'-
ⓘ'Hornblende Root Name Group'-◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Pinite'-
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Fergusonite'-
ⓘ'Orthopyroxene Subgroup'-
ⓘ'Feldspar Group
var. Sunstone'		-
ⓘ'Apatite'-Ca5(PO4)3A
ⓘ'Högbomite Group'-
ⓘ'Allanite Group'-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ Gedrite◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
BeBeryllium
Beⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
BBoron
Bⓘ DumortieriteAl(Al2O)(Al2O)2(SiO4)3(BO3)
Bⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
CCarbon
Cⓘ CalciteCaCO3
Cⓘ GraphiteC
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Amphibole SupergroupAB2C5(T8O22)W2
Oⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ Uraninite var. Thorian Uraninite(U,Th)O2
Oⓘ CalciteCaCO3
Oⓘ CordieriteMg2Al4Si5O18
Oⓘ CorundumAl2O3
Oⓘ DiopsideCaMgSi2O6
Oⓘ DumortieriteAl(Al2O)(Al2O)2(SiO4)3(BO3)
Oⓘ EnstatiteMg2Si2O6
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Oⓘ Gedrite◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
Oⓘ HematiteFe2O3
Oⓘ HercyniteFe2+Al2O4
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ Rutile var. Ilmenorutile(Ti,Nb)O2
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Monazite GroupREE(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oⓘ Thorite var. OrangiteTh(SiO4)
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ Samarskite-(Y)YFe3+Nb2O8
Oⓘ SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Oⓘ SillimaniteAl2(SiO4)O
Oⓘ SpinelMgAl2O4
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ ThoriteTh(SiO4)
Oⓘ TitaniteCaTiO(SiO4)
Oⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Oⓘ UraniniteUO2
Oⓘ Xenotime-(Y)Y(PO4)
Oⓘ ZirconZr(SiO4)
Oⓘ Cordierite var. Iolite(Mg,Fe)2Al3(AlSi5O18)
Oⓘ Titanite var. Yttrium-bearing Titanite(Ca,Y)TiSiO5
Oⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ ApatiteCa5(PO4)3A
Oⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ CordieriteMg2Al4Si5O18
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ Gedrite◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
Mgⓘ Hypersthene(Mg,Fe)SiO3
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Mgⓘ SpinelMgAl2O4
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ Cordierite var. Iolite(Mg,Fe)2Al3(AlSi5O18)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ CordieriteMg2Al4Si5O18
Alⓘ CorundumAl2O3
Alⓘ DumortieriteAl(Al2O)(Al2O)2(SiO4)3(BO3)
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ Gedrite◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
Alⓘ HercyniteFe2+Al2O4
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Alⓘ SillimaniteAl2(SiO4)O
Alⓘ SpinelMgAl2O4
Alⓘ Cordierite var. Iolite(Mg,Fe)2Al3(AlSi5O18)
Alⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ CordieriteMg2Al4Si5O18
Siⓘ DiopsideCaMgSi2O6
Siⓘ DumortieriteAl(Al2O)(Al2O)2(SiO4)3(BO3)
Siⓘ EnstatiteMg2Si2O6
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Siⓘ Gedrite◻Mg2(Mg3Al2)(Al2Si6O22)(OH)2
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siⓘ Thorite var. OrangiteTh(SiO4)
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ QuartzSiO2
Siⓘ SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Siⓘ SillimaniteAl2(SiO4)O
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ ThoriteTh(SiO4)
Siⓘ TitaniteCaTiO(SiO4)
Siⓘ ZirconZr(SiO4)
Siⓘ Cordierite var. Iolite(Mg,Fe)2Al3(AlSi5O18)
Siⓘ Titanite var. Yttrium-bearing Titanite(Ca,Y)TiSiO5
Siⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
PPhosphorus
Pⓘ Monazite GroupREE(PO4)
Pⓘ Xenotime-(Y)Y(PO4)
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ ArsenopyriteFeAsS
Sⓘ BorniteCu5FeS4
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ Native SulphurS8
Sⓘ ViolariteFe2+Ni23+S4
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Caⓘ PrehniteCa2Al2Si3O10(OH)2
Caⓘ TitaniteCaTiO(SiO4)
Caⓘ Titanite var. Yttrium-bearing Titanite(Ca,Y)TiSiO5
Caⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ Rutile var. Ilmenorutile(Ti,Nb)O2
Tiⓘ RutileTiO2
Tiⓘ TitaniteCaTiO(SiO4)
Tiⓘ Titanite var. Yttrium-bearing Titanite(Ca,Y)TiSiO5
FeIron
Feⓘ ArsenopyriteFeAsS
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Feⓘ HematiteFe2O3
Feⓘ HercyniteFe2+Al2O4
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ Samarskite-(Y)YFe3+Nb2O8
Feⓘ ViolariteFe2+Ni23+S4
Feⓘ Cordierite var. Iolite(Mg,Fe)2Al3(AlSi5O18)
NiNickel
Niⓘ Pentlandite(NixFey)Σ9S8
Niⓘ ViolariteFe2+Ni23+S4
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
AsArsenic
Asⓘ ArsenopyriteFeAsS
YYttrium
Yⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Yⓘ Samarskite-(Y)YFe3+Nb2O8
Yⓘ Xenotime-(Y)Y(PO4)
Yⓘ Titanite var. Yttrium-bearing Titanite(Ca,Y)TiSiO5
ZrZirconium
Zrⓘ ZirconZr(SiO4)
NbNiobium
Nbⓘ Rutile var. Ilmenorutile(Ti,Nb)O2
Nbⓘ Samarskite-(Y)YFe3+Nb2O8
AgSilver
Agⓘ Native SilverAg
ThThorium
Thⓘ Uraninite var. Thorian Uraninite(U,Th)O2
Thⓘ Thorite var. OrangiteTh(SiO4)
Thⓘ ThoriteTh(SiO4)
UUranium
Uⓘ Uraninite var. Thorian Uraninite(U,Th)O2
Uⓘ UraniniteUO2

Fossils

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Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Tvedestrand
Wikidata ID:Q90597
GeoNames ID:3133680

Localities in this Region

Norway
Norway

Other Regions, Features and Areas that Intersect

Baltic Shield (Fennoscandian Shield)Shield
Eurasian PlateTectonic Plate
EuropeContinent

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

Weibye, Paul Christian (1848) Beiträge zur topograpischen Mineralogie Norwegens. Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde, 22. 465-544
Solås, Erna M. (1990) Minner fra de gamle feltspat-gruvene i Tvedestrand-området. In Sørlandet Geologiforening 20 år 1990. 1970-1990 et 20 års-skrift [Sørlandet Geological Society 20 year 1990. 1970-1990 a 20 year publication]. Sørlandet Geologiforening. p.52-56.
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