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Hardscrabble Mining District, Custer Co., Colorado, USAi
Regional Level Types
Hardscrabble Mining DistrictMining District
Custer Co.County
ColoradoState
USACountry

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Key
Latitude & Longitude (WGS84):
38° North , 105° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~42km
Locality type:


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

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

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Standard Detailed Strunz Dana 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

35 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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

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Alphabetical List Tree Diagram

Detailed Mineral List:

''
Localities:
'Albite-Anorthite Series'
Reference: Minerals of Colorado (1997) Eckel, E. B.
Alunite
Formula: KAl3(SO4)2(OH)6
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Arsenopyrite
Formula: FeAsS
Reference: Minerals of Colorado (1997) Eckel, E. B.; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Baryte
Formula: BaSO4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Bornite
Formula: Cu5FeS4
Brucite
Formula: Mg(OH)2
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
'Clays'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Clinohumite
Formula: Mg9(SiO4)4F2
Reference: Minerals of Colorado (1997) Eckel, E. B.
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Corundum
Formula: Al2O3
Covellite
Formula: CuS
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Forsterite
Formula: Mg2SiO4
Reference: Minerals of Colorado (1997) Eckel, E. B.
Gahnite
Formula: ZnAl2O4
Galena
Formula: PbS
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Minerals of Colorado (1997) E.B. Eckel
Gold
Formula: Au
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Hematite
Formula: Fe2O3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Hypersthene'
Formula: (Mg,Fe)SiO3
Reference: Minerals of Colorado (1997) Eckel, E. B.
Ilmenite
Formula: Fe2+TiO3
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'K Feldspar'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Magnetite
Formula: Fe2+Fe3+2O4
Marcasite
Formula: FeS2
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
'Orthopyroxene Subgroup'
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe7S8
Quartz
Formula: SiO2
Rutile
Formula: TiO2
Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Siderite
Formula: FeCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sillimanite
Formula: Al2(SiO4)O
Reference: Minerals of Colorado (1997) Eckel, E. B.
Silver
Formula: Ag
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Spinel
Formula: MgAl2O4
Thorite
Formula: Th(SiO4)
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Minerals of Colorado (1997) E.B. Eckel
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Wollastonite
Formula: CaSiO3
Reference: Minerals of Colorado (1997) E.B. Eckel

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Galena2.CD.10PbS
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Brucite4.FE.05Mg(OH)2
Corundum4.CB.05Al2O3
Gahnite4.BB.05ZnAl2O4
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alunite7.BC.10KAl3(SO4)2(OH)6
Baryte7.AD.35BaSO4
Group 9 - Silicates
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Clinohumite9.AF.55Mg9(SiO4)4F2
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Forsterite9.AC.05Mg2SiO4
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Sapphirine9.DH.45Mg4(Mg3Al9)O4[Si3Al9O36]
Sillimanite9.AF.05Al2(SiO4)O
Thorite9.AD.30Th(SiO4)
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Wollastonite9.DG.05CaSiO3
Unclassified Minerals, Rocks, etc.
''-
'Albite-Anorthite Series'-
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Clays'-
'Garnet Group'-X3Z2(SiO4)3
'Hypersthene'-(Mg,Fe)SiO3
'K Feldspar'-
'Limonite'-(Fe,O,OH,H2O)
'Orthopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
X(OH)2
Brucite6.2.1.1Mg(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
Gahnite7.2.1.4ZnAl2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Spinel7.2.1.1MgAl2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Alunite30.2.4.1KAl3(SO4)2(OH)6
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Clinohumite52.3.2d.1Mg9(SiO4)4F2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 69 - INOSILICATES Chains with Side Branches or Loops
Chains with Side Branches or Loops with P>2
Sapphirine69.2.1b.1Mg4(Mg3Al9)O4[Si3Al9O36]
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Vermiculite71.2.2d.3Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
''-
'Albite-Anorthite Series'-
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Clays'-
'Garnet Group'-X3Z2(SiO4)3
'Hypersthene'-(Mg,Fe)SiO3
'K Feldspar'-
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
'Orthopyroxene Subgroup'-

List of minerals for each chemical element

HHydrogen
H AluniteKAl3(SO4)2(OH)6
H KaoliniteAl2(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H BruciteMg(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
CCarbon
C CalciteCaCO3
C SideriteFeCO3
OOxygen
O AluniteKAl3(SO4)2(OH)6
O QuartzSiO2
O KaoliniteAl2(Si2O5)(OH)4
O ThoriteTh(SiO4)
O BaryteBaSO4
O Limonite(Fe,O,OH,H2O)
O CalciteCaCO3
O HematiteFe2O3
O SideriteFeCO3
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
O BruciteMg(OH)2
O ClinohumiteMg9(SiO4)4F2
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O SillimaniteAl2(SiO4)O
O CorundumAl2O3
O GahniteZnAl2O4
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O Hypersthene(Mg,Fe)SiO3
O ForsteriteMg2SiO4
O SpinelMgAl2O4
O Garnet GroupX3Z2(SiO4)3
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O WollastoniteCaSiO3
O MagnetiteFe2+Fe23+O4
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O IlmeniteFe2+TiO3
O RutileTiO2
FFluorine
F ClinohumiteMg9(SiO4)4F2
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Mg BruciteMg(OH)2
Mg ClinohumiteMg9(SiO4)4F2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg Hypersthene(Mg,Fe)SiO3
Mg ForsteriteMg2SiO4
Mg SpinelMgAl2O4
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al AluniteKAl3(SO4)2(OH)6
Al KaoliniteAl2(Si2O5)(OH)4
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Al SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al SillimaniteAl2(SiO4)O
Al CorundumAl2O3
Al GahniteZnAl2O4
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al SpinelMgAl2O4
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si QuartzSiO2
Si KaoliniteAl2(Si2O5)(OH)4
Si ThoriteTh(SiO4)
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Si ClinohumiteMg9(SiO4)4F2
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si SillimaniteAl2(SiO4)O
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Hypersthene(Mg,Fe)SiO3
Si ForsteriteMg2SiO4
Si Garnet GroupX3Z2(SiO4)3
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si WollastoniteCaSiO3
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SSulfur
S AluniteKAl3(SO4)2(OH)6
S BorniteCu5FeS4
S GalenaPbS
S BaryteBaSO4
S SphaleriteZnS
S ChalcopyriteCuFeS2
S ArsenopyriteFeAsS
S PyrrhotiteFe7S8
S PyriteFeS2
S MarcasiteFeS2
S CovelliteCuS
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K AluniteKAl3(SO4)2(OH)6
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CaCalcium
Ca CalciteCaCO3
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca WollastoniteCaSiO3
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
FeIron
Fe BorniteCu5FeS4
Fe Limonite(Fe,O,OH,H2O)
Fe HematiteFe2O3
Fe SideriteFeCO3
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Fe ChalcopyriteCuFeS2
Fe ArsenopyriteFeAsS
Fe PyrrhotiteFe7S8
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe Hypersthene(Mg,Fe)SiO3
Fe PyriteFeS2
Fe MarcasiteFeS2
Fe MagnetiteFe2+Fe23+O4
Fe IlmeniteFe2+TiO3
CuCopper
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu CovelliteCuS
ZnZinc
Zn SphaleriteZnS
Zn GahniteZnAl2O4
AsArsenic
As ArsenopyriteFeAsS
AgSilver
Ag SilverAg
BaBarium
Ba BaryteBaSO4
AuGold
Au GoldAu
PbLead
Pb GalenaPbS
ThThorium
Th ThoriteTh(SiO4)

Localities in this Region


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