Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Cook County, Minnesota, USAi
Regional Level Types
Cook CountyCounty
MinnesotaState
USACountry

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PhotosMapsSearch
05918970017272061841581.jpg
Stilbite Vein

Temperance River, Schroeder, Cook County, Minnesota, USA
01035510017367591954953.jpg
Datolite

Cook County, Minnesota, USA
00894360017272061862535.jpg
Prehnite

Cook County, Minnesota, USA
05918970017272061841581.jpg
Stilbite Vein

Temperance River, Schroeder, Cook County, Minnesota, USA
01035510017367591954953.jpg
Datolite

Cook County, Minnesota, USA
00894360017272061862535.jpg
Prehnite

Cook County, Minnesota, USA
03444240017272061862996.jpg
Stilbite Vein

Temperance River, Schroeder, Cook County, Minnesota, USA
01035510017367591954953.jpg
Datolite

Cook County, Minnesota, USA
Neighbouring regions:
Thunder Bay District, Ontario, Canada
Rainy River District, Ontario, Canada
Lake County, Minnesota, USA
Type:
County
Largest Settlements:
PlacePopulation
Grand Marais1,327 (2017)
Lutsen190 (2017)
Mindat Locality ID:
31295
Long-form identifier:
mindat:1:2:31295:3
GUID (UUID V4):
0
Other Languages:
View 35 more...
French:
comté de Cook, Minnesota, États-Unis
German:
Cook County, Minnesota, Vereinigte Staaten
Italian:
contea di Cook, Minnesota, Stati Uniti d'America
Russian:
Кук, Миннесота, Соединённые Штаты Америки
Simplified Chinese:
庫克縣, 明尼蘇達州, 美国
Spanish:
Condado de Cook, Minesota, Estados Unidos
Albanian:
Cook County, Minnesota, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة كوك, مينيسوتا, الولايات المتحدة
Armenian:
Քուկ շրջան, Մինեսոտա, Ամերիկայի Միացյալ Նահանգներ
Basque:
Cook konderria , Minnesota
Bavarian:
Cook County, Minnesota, Vaoanigte Stootn
Bishnupriya Manipuri:
কোক কাউন্টি, মিনেসোটা, তিলপারাষ্ট্র
Bulgarian:
Кук, Минесота, Съединени американски щати
Cebuano:
Cook County , Minnesota
Danish:
Cook County, Minnesota, USA
Dutch:
Cook County, Minnesota, Verenigde Staten
Farsi/Persian:
شهرستان کوک، مینه‌سوتا, مینه‌سوتا, ایالات متحده آمریکا
Georgian:
კუკის ოლქი, მინესოტა, ამერიკის შეერთებული შტატები
Hebrew:
מחוז קוק, מינסוטה, ארצות הברית
Hungarian:
Cook megye, Minnesota, Amerikai Egyesült Államok
Japanese:
クック郡, ミネソタ州, アメリカ合衆国
Latin:
Cook Comitatus, Minnesota, Civitates Foederatae Americae
Low Saxon/Low German:
Cook County, Minnesota, USA
Min Dong Chinese:
Cook Gông, Minnesota
Minnan / Hokkien-Taiwanese:
Cook Kūn
Norwegian:
Cook County, Minnesota, USA
Polish:
Hrabstwo Cook, Minnesota, Stany Zjednoczone
Portuguese:
Condado de Cook, Minnesota, Estados Unidos
Romanian:
Comitatul Cook, Minnesota, Statele Unite ale Americii
Sardinian:
contea de Cook, Minnesota, Istados Unidos de Amèrica
Scottish Gaelic:
Cook County, Minnesota, Na Stàitean Aonaichte
Serbian:
Округ Кук, Минесота, Сједињене Америчке Државе
Serbo-Croatian:
Cook County, Minnesota, Sjedinjene Američke Države
Swedish:
Cook County, Minnesota, USA
Traditional Chinese:
庫克縣, 明尼蘇達州, 美國
Turkish:
Cook ilçesi, Minnesota, Amerika Birleşik Devletleri
Ukrainian:
Кук, Міннесота, Сполучені Штати Америки
Urdu:
کک کاؤنٹی، مینیسوٹا, مینیسوٹا, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Cook, Minnesota, Chủng Quốc Hoa Kỳ
Waray:
Condado han Cook, Minnesota, Estados Unidos
Western Punjabi:
کک کاؤنٹی، منسسوٹا, منی سوٹا, امریکہ


No description has been added for this locality. Can you add one?

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

33 valid minerals. 1 (TL) - type locality of 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:

ⓘ Anorthite
Formula: Ca(Al2Si2O8)
ⓘ Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcocite var. Silver-bearing Chalcocite
Formula: (Cu,Ag)2S
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Cubanite
Formula: CuFe2S3
ⓘ Datolite
Formula: CaB(SiO4)(OH)
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ 'Fayalite-Forsterite Series'
ⓘ Fluorite
Formula: CaF2
ⓘ Graphite
Formula: C
Habit: nodules in matrix
ⓘ Hematite
Formula: Fe2O3
ⓘ 'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ Ilmenite
Formula: Fe2+TiO3
Localities: Reported from at least 7 localities in this region.
ⓘ 'K Feldspar'
ⓘ Laumontite
Formula: CaAl2Si4O12 · 4H2O
References:
Samuel Anderson CollectionIdentified by Samuel Anderson: Visual Identification
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 8 localities in this region.
ⓘ Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
ⓘ Mesolite var. Pseudomesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
ⓘ Native Copper
Formula: Cu
ⓘ Native Gold
Formula: Au
ⓘ Native Silver
Formula: Ag
ⓘ Natrolite ?
Formula: Na2Al2Si3O10 · 2H2O
ⓘ Pentlandite
Formula: (NixFey)Σ9S8
ⓘ Pigeonite (TL)
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Type Locality:
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ Pumpellyite-(Fe2+) ?
Formula: Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
References:
Samuel Anderson CollectionIdentified by Samuel Anderson: Visual Identification
ⓘ Pyrite
Formula: FeS2
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 9 localities in this region.
ⓘ Quartz var. Agate
Formula: SiO2
ⓘ Quartz var. Amethyst
Formula: SiO2
ⓘ Quartz var. Chalcedony
Formula: SiO2
ⓘ Quartz var. Lake Superior Agate
Formula: SiO2
Colour: multi-colored
Description: Agates can be found along the beaches near Grand Marais.
ⓘ Saponite
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
References:
Samuel Anderson CollectionIdentified by Samuel Anderson: Visual Identification
ⓘ Scolecite
Formula: CaAl2Si3O10 · 3H2O
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Sphalerite
Formula: ZnS
ⓘ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
ⓘ Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
ⓘ Violarite
Formula: Fe2+Ni3+2S4
ⓘ Xonotlite
Formula: Ca6(Si6O17)(OH)2

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Gold1.AA.05Au
ⓘNative Silver1.AA.05Ag
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘvar. Silver-bearing Chalcocite2.BA.05(Cu,Ag)2S
ⓘBornite2.BA.15Cu5FeS4
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘCubanite2.CB.55aCuFe2S3
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘViolarite2.DA.05Fe2+Ni3+2S4
ⓘPyrite2.EB.05aFeS2
Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz
var. Agate		4.DA.05SiO2
ⓘvar. Amethyst4.DA.05SiO2
ⓘvar. Chalcedony4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘvar. Lake Superior Agate4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘDatolite9.AJ.20CaB(SiO4)(OH)
ⓘPumpellyite-(Fe2+) ?9.BG.20Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
ⓘPigeonite (TL)9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘDiopside9.DA.15CaMgSi2O6
ⓘXonotlite9.DG.35Ca6(Si6O17)(OH)2
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘSaponite9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
ⓘMesolite9.GA.05Na2Ca2Si9Al6O30 · 8H2O
ⓘNatrolite ?9.GA.05Na2Al2Si3O10 · 2H2O
ⓘScolecite9.GA.05CaAl2Si3O10 · 3H2O
ⓘMesolite
var. Pseudomesolite		9.GA.05Na2Ca2Si9Al6O30 · 8H2O
ⓘThomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
ⓘLaumontite9.GB.10CaAl2Si4O12 · 4H2O
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Hornblende Root Name Group'-◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4

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ⓘ DatoliteCaB(SiO4)(OH)
Hⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Hⓘ LaumontiteCaAl2Si4O12 · 4H2O
Hⓘ MesoliteNa2Ca2Si9Al6O30 · 8H2O
Hⓘ NatroliteNa2Al2Si3O10 · 2H2O
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ Pumpellyite-(Fe2+)Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
Hⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Hⓘ ScoleciteCaAl2Si3O10 · 3H2O
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hⓘ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Hⓘ XonotliteCa6(Si6O17)(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
Hⓘ Mesolite var. PseudomesoliteNa2Ca2Si9Al6O30 · 8H2O
BBoron
Bⓘ DatoliteCaB(SiO4)(OH)
CCarbon
Cⓘ CalciteCaCO3
Cⓘ GraphiteC
OOxygen
Oⓘ Quartz var. AgateSiO2
Oⓘ Quartz var. AmethystSiO2
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ DiopsideCaMgSi2O6
Oⓘ DatoliteCaB(SiO4)(OH)
Oⓘ HematiteFe2O3
Oⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Oⓘ IlmeniteFe2+TiO3
Oⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ LaumontiteCaAl2Si4O12 · 4H2O
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MesoliteNa2Ca2Si9Al6O30 · 8H2O
Oⓘ NatroliteNa2Al2Si3O10 · 2H2O
Oⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ Pumpellyite-(Fe2+)Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
Oⓘ QuartzSiO2
Oⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Oⓘ ScoleciteCaAl2Si3O10 · 3H2O
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oⓘ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Oⓘ XonotliteCa6(Si6O17)(OH)2
Oⓘ Fayalite-Forsterite Series
Oⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Oⓘ Quartz var. Lake Superior AgateSiO2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Pyroxene GroupADSi2O6
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ Mesolite var. PseudomesoliteNa2Ca2Si9Al6O30 · 8H2O
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ FluoriteCaF2
NaSodium
Naⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Naⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Naⓘ MesoliteNa2Ca2Si9Al6O30 · 8H2O
Naⓘ NatroliteNa2Al2Si3O10 · 2H2O
Naⓘ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Naⓘ Mesolite var. PseudomesoliteNa2Ca2Si9Al6O30 · 8H2O
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Alⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ LaumontiteCaAl2Si4O12 · 4H2O
Alⓘ MesoliteNa2Ca2Si9Al6O30 · 8H2O
Alⓘ NatroliteNa2Al2Si3O10 · 2H2O
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ Pumpellyite-(Fe2+)Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
Alⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Alⓘ ScoleciteCaAl2Si3O10 · 3H2O
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alⓘ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Alⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Alⓘ Mesolite var. PseudomesoliteNa2Ca2Si9Al6O30 · 8H2O
SiSilicon
Siⓘ Quartz var. AgateSiO2
Siⓘ Quartz var. AmethystSiO2
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ DiopsideCaMgSi2O6
Siⓘ DatoliteCaB(SiO4)(OH)
Siⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Siⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ LaumontiteCaAl2Si4O12 · 4H2O
Siⓘ MesoliteNa2Ca2Si9Al6O30 · 8H2O
Siⓘ NatroliteNa2Al2Si3O10 · 2H2O
Siⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ Pumpellyite-(Fe2+)Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
Siⓘ QuartzSiO2
Siⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Siⓘ ScoleciteCaAl2Si3O10 · 3H2O
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siⓘ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Siⓘ XonotliteCa6(Si6O17)(OH)2
Siⓘ Fayalite-Forsterite Series
Siⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Siⓘ Quartz var. Lake Superior AgateSiO2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
Siⓘ Mesolite var. PseudomesoliteNa2Ca2Si9Al6O30 · 8H2O
SSulfur
Sⓘ BorniteCu5FeS4
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ CubaniteCuFe2S3
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ ViolariteFe2+Ni23+S4
Sⓘ Chalcocite var. Silver-bearing Chalcocite(Cu,Ag)2S
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
CaCalcium
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ DatoliteCaB(SiO4)(OH)
Caⓘ FluoriteCaF2
Caⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Caⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ LaumontiteCaAl2Si4O12 · 4H2O
Caⓘ MesoliteNa2Ca2Si9Al6O30 · 8H2O
Caⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ PrehniteCa2Al2Si3O10(OH)2
Caⓘ Pumpellyite-(Fe2+)Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
Caⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Caⓘ ScoleciteCaAl2Si3O10 · 3H2O
Caⓘ Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Caⓘ XonotliteCa6(Si6O17)(OH)2
Caⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ Mesolite var. PseudomesoliteNa2Ca2Si9Al6O30 · 8H2O
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ CubaniteCuFe2S3
Feⓘ HematiteFe2O3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ Pumpellyite-(Fe2+)Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH)
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Feⓘ ViolariteFe2+Ni23+S4
Feⓘ Fayalite-Forsterite Series
NiNickel
Niⓘ Pentlandite(NixFey)Σ9S8
Niⓘ ViolariteFe2+Ni23+S4
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
Cuⓘ CubaniteCuFe2S3
Cuⓘ Native CopperCu
Cuⓘ Chalcocite var. Silver-bearing Chalcocite(Cu,Ag)2S
ZnZinc
Znⓘ SphaleriteZnS
AgSilver
Agⓘ Native SilverAg
Agⓘ Chalcocite var. Silver-bearing Chalcocite(Cu,Ag)2S
AuGold
Auⓘ Native GoldAu

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Cook_County,_Minnesota
Wikidata ID:Q156619
GeoNames ID:5021977

Localities in this Region

USA
USA

Other Regions, Features and Areas that Intersect

North AmericaContinent
North America PlateTectonic Plate
USA

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

Grout, F.F. (1959) The geology of Cook County, Minnesota: Minnesota Geological Survey Bulletin 39, 190 p.
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