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Seikoshi mine, Izu City, Shizuoka Prefecture, Japani
Regional Level Types
Seikoshi mineMine
Izu CityCity
Shizuoka PrefecturePrefecture
JapanCountry

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00457490017272002249479.jpg
Yugawaralite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
07034160017272002259978.jpg
Pearceite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
02418880017272002273216.jpg
Pearceite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
00457490017272002249479.jpg
Yugawaralite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
07034160017272002259978.jpg
Pearceite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
02418880017272002273216.jpg
Pearceite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
00457490017272002249479.jpg
Yugawaralite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
07490430017272002419583.jpg
Pearceite, etc.

Seikoshi mine, Izu City, Shizuoka Prefecture, Japan
Latitude & Longitude (WGS84):
34° 53' 59'' North , 138° 49' 36'' East
Latitude & Longitude (decimal):
34.90000,138.82694
GRN:
N24E81
Type:
Mine
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Heda3,681 (2017)7.9km
Numazu204,318 (2017)22.5km
Itō71,578 (2017)24.5km
Mishima113,479 (2017)25.4km
Shimoda26,704 (2017)27.1km
Mindat Locality ID:
2204
Long-form identifier:
mindat:1:2:2204:3
GUID (UUID V4):
0
Other/historical names associated with this locality:
Seigoshi Mine; Seigoushi mine; Toishinden roadcut


A gold and silver mine, worked from 1935 until 1983. The deposit was in altered volcanic rocks (propylitized Miocene andesite).

A road cut next to the mine was briefly famous for zeolite specimens (including yugawaralite crystals up to 3 cm long), but is now completely covered with concrete to prevent erosion.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


25 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Acanthite
Formula: Ag2S
ⓘ Beidellite
Formula: (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
ⓘ Calcite
Formula: CaCO3
ⓘ 'Chabazite'
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Galena
Formula: PbS
ⓘ 'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ Inesite
Formula: Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
ⓘ 'K Feldspar'
ⓘ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
ⓘ Laumontite
Formula: CaAl2Si4O12 · 4H2O
ⓘ Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Gold
Formula: Au
ⓘ Native Gold var. Electrum
Formula: (Au,Ag)
ⓘ Native Silver
Formula: Ag
ⓘ Pearceite
Formula: [Ag6As2S7][Ag9CuS4]
ⓘ Polybasite
Formula: [Ag6Sb2S7][Ag9CuS4]
ⓘ 'Polybasite-Tac'
Formula: [Ag6Sb2S7][Ag9CuS4]
ⓘ Pyrargyrite
Formula: Ag3SbS3
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Rhodochrosite
Formula: MnCO3
ⓘ Scolecite
Formula: CaAl2Si3O10 · 3H2O
ⓘ Sphalerite
Formula: ZnS
ⓘ Stellerite
Formula: Ca4(Si28Al8)O72 · 28H2O
ⓘ Stephanite
Formula: Ag5SbS4
ⓘ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Wairakite
Formula: Ca(Al2Si4O12) · 2H2O
ⓘ Xonotlite
Formula: Ca6(Si6O17)(OH)2
ⓘ Yugawaralite
Formula: CaAl2Si6O16 · 4H2O

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold
var. Electrum		1.AA.05(Au,Ag)
ⓘ1.AA.05Au
ⓘNative Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
ⓘAcanthite2.BA.35Ag2S
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘPyrargyrite2.GA.05Ag3SbS3
ⓘ'Polybasite-Tac'2.GB.[Ag6Sb2S7][Ag9CuS4]
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
ⓘStephanite2.GB.10Ag5SbS4
ⓘPearceite2.GB.15[Ag6As2S7][Ag9CuS4]
ⓘPolybasite2.GB.15[Ag6Sb2S7][Ag9CuS4]
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘRhodochrosite5.AB.05MnCO3
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘXonotlite9.DG.35Ca6(Si6O17)(OH)2
ⓘInesite9.DL.05Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘBeidellite9.EC.40(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
ⓘScolecite9.GA.05CaAl2Si3O10 · 3H2O
ⓘWairakite9.GB.05Ca(Al2Si4O12) · 2H2O
ⓘLaumontite9.GB.10CaAl2Si4O12 · 4H2O
ⓘYugawaralite9.GB.15CaAl2Si6O16 · 4H2O
ⓘMordenite9.GD.35(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
ⓘStellerite9.GE.15Ca4(Si28Al8)O72 · 28H2O
Unclassified
ⓘ'K Feldspar
var. Adularia'		-KAlSi3O8
ⓘ'Chabazite'-
ⓘ'Chlorite Group'-
ⓘ'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hⓘ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Hⓘ InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Hⓘ LaumontiteCaAl2Si4O12 · 4H2O
Hⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ ScoleciteCaAl2Si3O10 · 3H2O
Hⓘ StelleriteCa4(Si28Al8)O72 · 28H2O
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hⓘ WairakiteCa(Al2Si4O12) · 2H2O
Hⓘ XonotliteCa6(Si6O17)(OH)2
Hⓘ YugawaraliteCaAl2Si6O16 · 4H2O
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CCarbon
Cⓘ CalciteCaCO3
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ K Feldspar var. AdulariaKAlSi3O8
Oⓘ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Oⓘ CalciteCaCO3
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Oⓘ InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Oⓘ LaumontiteCaAl2Si4O12 · 4H2O
Oⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ RhodochrositeMnCO3
Oⓘ ScoleciteCaAl2Si3O10 · 3H2O
Oⓘ StelleriteCa4(Si28Al8)O72 · 28H2O
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oⓘ WairakiteCa(Al2Si4O12) · 2H2O
Oⓘ XonotliteCa6(Si6O17)(OH)2
Oⓘ YugawaraliteCaAl2Si6O16 · 4H2O
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
NaSodium
Naⓘ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Naⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Naⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
AlAluminium
Alⓘ K Feldspar var. AdulariaKAlSi3O8
Alⓘ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Alⓘ LaumontiteCaAl2Si4O12 · 4H2O
Alⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ ScoleciteCaAl2Si3O10 · 3H2O
Alⓘ StelleriteCa4(Si28Al8)O72 · 28H2O
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alⓘ WairakiteCa(Al2Si4O12) · 2H2O
Alⓘ YugawaraliteCaAl2Si6O16 · 4H2O
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ K Feldspar var. AdulariaKAlSi3O8
Siⓘ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Siⓘ InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Siⓘ LaumontiteCaAl2Si4O12 · 4H2O
Siⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ ScoleciteCaAl2Si3O10 · 3H2O
Siⓘ StelleriteCa4(Si28Al8)O72 · 28H2O
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siⓘ WairakiteCa(Al2Si4O12) · 2H2O
Siⓘ XonotliteCa6(Si6O17)(OH)2
Siⓘ YugawaraliteCaAl2Si6O16 · 4H2O
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SSulfur
Sⓘ AcanthiteAg2S
Sⓘ Polybasite-Tac[Ag6Sb2S7][Ag9CuS4]
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ Pearceite[Ag6As2S7][Ag9CuS4]
Sⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Sⓘ PyrargyriteAg3SbS3
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
Sⓘ StephaniteAg5SbS4
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
KPotassium
Kⓘ K Feldspar var. AdulariaKAlSi3O8
Kⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Kⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Caⓘ CalciteCaCO3
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Caⓘ InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Caⓘ LaumontiteCaAl2Si4O12 · 4H2O
Caⓘ Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Caⓘ ScoleciteCaAl2Si3O10 · 3H2O
Caⓘ StelleriteCa4(Si28Al8)O72 · 28H2O
Caⓘ WairakiteCa(Al2Si4O12) · 2H2O
Caⓘ XonotliteCa6(Si6O17)(OH)2
Caⓘ YugawaraliteCaAl2Si6O16 · 4H2O
MnManganese
Mnⓘ InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Mnⓘ RhodochrositeMnCO3
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Feⓘ PyriteFeS2
CuCopper
Cuⓘ Polybasite-Tac[Ag6Sb2S7][Ag9CuS4]
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ Pearceite[Ag6As2S7][Ag9CuS4]
Cuⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ Pearceite[Ag6As2S7][Ag9CuS4]
AgSilver
Agⓘ AcanthiteAg2S
Agⓘ Polybasite-Tac[Ag6Sb2S7][Ag9CuS4]
Agⓘ Native Gold var. Electrum(Au,Ag)
Agⓘ Pearceite[Ag6As2S7][Ag9CuS4]
Agⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Agⓘ PyrargyriteAg3SbS3
Agⓘ Native SilverAg
Agⓘ StephaniteAg5SbS4
SbAntimony
Sbⓘ Polybasite-Tac[Ag6Sb2S7][Ag9CuS4]
Sbⓘ Polybasite[Ag6Sb2S7][Ag9CuS4]
Sbⓘ PyrargyriteAg3SbS3
Sbⓘ StephaniteAg5SbS4
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
AuGold
Auⓘ Native Gold var. Electrum(Au,Ag)
Auⓘ Native GoldAu
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

AsiaContinent
Eurasian Plate
Japan
Philippine Sea PlateTectonic Plate

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

Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., Watanabe, Y. (2007) Mineral Resources Map of East Asia, Geological Survey of Japan.
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