Ramik, R. A., Organ, R. M., Mandarino, J. A. (2003) On type romarchite and hydroromarchite from Boundary Falls, Ontario, and notes on other occurrences. The Canadian Mineralogist, 41 (3). 649-657 doi:10.2113/gscanmin.41.3.649

ⓘ Scheelite

Formula: Ca(WO₄)

Localities:

Flintstone Group, Bay Horse Mining District, Custer County, Idaho, USA
Buckskin Claims, Bay Horse Mining District, Custer County, Idaho, USA
Thompson Creek Mine (Tungsten Jim Mine; Salmon River Scheelite Mine), Challis, Bay Horse Mining District, Custer County, Idaho, USA

ⓘ Siderite

Formula: FeCO₃

Localities: Reported from at least 10 localities in this region.

ⓘ Smithsonite

Formula: ZnCO₃

Localities: Reported from at least 6 localities in this region.

ⓘ Sphalerite

Formula: ZnS

Localities: Reported from at least 7 localities in this region.

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S

Localities: Reported from at least 14 localities in this region.

ⓘ Titanite

Formula: CaTiO(SiO₄)

Locality: Mill Creek Bar Placer, Bay Horse Mining District, Custer County, Idaho, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Vesuvianite

Formula: Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉

Locality: Buckskin Claims, Bay Horse Mining District, Custer County, Idaho, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Willemite

Formula: Zn₂SiO₄

Locality: Keystone Mountain, Bay Horse Mining District, Custer County, Idaho, USA

References:

Ream, Lanny R. (2004) Idaho Minerals (2nd ed.) L. R. Ream Publishing.

ⓘ Zircon

Formula: Zr(SiO₄)

Locality: Mill Creek Bar Placer, Bay Horse Mining District, Custer County, Idaho, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

Gallery:

PbSO₄ⓘ Anglesite

Anglesite

Redbird Mine, Bay Horse Mining District, Custer County, Idaho, USA

Anglesite

Redbird Mine, Bay Horse Mining District, Custer County, Idaho, USA

Anglesite

Redbird Mine, Bay Horse Mining District, Custer County, Idaho, USA

Cu₃(CO₃)₂(OH)₂ⓘ Azurite

Azurite, etc.

Challis, Bay Horse Mining District, Custer County, Idaho, USA

Azurite, etc.

Challis, Bay Horse Mining District, Custer County, Idaho, USA

Azurite, etc.

Challis, Bay Horse Mining District, Custer County, Idaho, USA

CaCO₃ⓘ Calcite

Calcite

Challis, Bay Horse Mining District, Custer County, Idaho, USA

Calcite

Challis, Bay Horse Mining District, Custer County, Idaho, USA

Calcite

Challis, Bay Horse Mining District, Custer County, Idaho, USA

PbSⓘ Galena

Galena

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Galena

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Galena

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

FeCO₃ⓘ Siderite

Siderite

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Siderite

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Siderite

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Cu₆(Cu₄C²⁺₂)Sb₄S₁₂Sⓘ 'Tetrahedrite Subgroup'

Tetrahedrite Subgroup, etc.

Turtle Mine, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Turtle Mine, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Turtle Mine, Bay Horse Mining District, Custer County, Idaho, USA

Tetrahedrite Subgroup, etc.

Ramshorn Mine, Ramshorn Mountain, Bay Horse Mining District, Custer County, Idaho, USA

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Silver	1.AA.05	Ag
Group 2 - Sulphides and Sulfosalts
ⓘ	Digenite	2.BA.10	Cu₉S₅
ⓘ	Acanthite	2.BA.35	Ag₂S
ⓘ	Covellite	2.CA.05a	CuS
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Cubanite	2.CB.55a	CuFe₂S₃
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Galena	2.CD.10	PbS
ⓘ	Molybdenite	2.EA.30	MoS₂
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
ⓘ	'Tetrahedrite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S
ⓘ	Polybasite	2.GB.15	[Ag₆Sb₂S₇][Ag₉CuS₄]
Group 3 - Halides
ⓘ	Chlorargyrite	3.AA.15	AgCl
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Romarchite	4.AC.20	SnO
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Minium	4.BD.05	Pb₃O₄
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Quartz var. Agate	4.DA.05	SiO₂
ⓘ	var. Chalcedony	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	var. Iris Agate	4.DA.05	SiO₂
ⓘ	Opal	4.DA.10	SiO₂ · nH₂O
ⓘ	Oxyplumboroméite	4.DH.	Pb₂Sb₂O₆O
ⓘ	Bindheimite	4.DH.20	Pb₂Sb₂O₆O
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
ⓘ	Smithsonite	5.AB.05	ZnCO₃
ⓘ	Calcite var. Argentine	5.AB.05	CaCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
ⓘ	Aragonite	5.AB.15	CaCO₃
ⓘ	Cerussite	5.AB.15	PbCO₃
ⓘ	Azurite	5.BA.05	Cu₃(CO₃)₂(OH)₂
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
ⓘ	Aurichalcite	5.BA.15	(Zn,Cu)₅(CO₃)₂(OH)₆
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Anglesite	7.AD.35	PbSO₄
ⓘ	Baryte	7.AD.35	BaSO₄
ⓘ	Brochantite	7.BB.25	Cu₄(SO₄)(OH)₆
ⓘ	Jarosite	7.BC.10	KFe³⁺₃(SO₄)₂(OH)₆
ⓘ	Plumbojarosite	7.BC.10	Pb_0.5Fe³⁺₃(SO₄)₂(OH)₆
ⓘ	Caledonite	7.BC.50	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
ⓘ	Linarite	7.BC.65	PbCu(SO₄)(OH)₂
ⓘ	Gypsum	7.CD.40	CaSO₄ · 2H₂O
ⓘ	Powellite	7.GA.05	Ca(MoO₄)
ⓘ	Scheelite	7.GA.05	Ca(WO₄)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Conichalcite	8.BH.35	CaCu(AsO₄)(OH)
ⓘ	Duftite	8.BH.35	PbCu(AsO₄)(OH)
ⓘ	Bayldonite	8.BH.45	PbCu₃(AsO₄)₂(OH)₂
ⓘ	Mimetite	8.BN.05	Pb₅(AsO₄)₃Cl
Group 9 - Silicates
ⓘ	Willemite	9.AA.05	Zn₂SiO₄
ⓘ	Andradite	9.AD.25	Ca₃Fe³⁺₂(SiO₄)₃
ⓘ	Grossular	9.AD.25	Ca₃Al₂(SiO₄)₃
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Titanite	9.AG.15	CaTiO(SiO₄)
ⓘ	Hemimorphite	9.BD.10	Zn₄Si₂O₇(OH)₂ · H₂O
ⓘ	Vesuvianite	9.BG.35	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
ⓘ	Elbaite	9.CK.05	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Montmorillonite	9.EC.40	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
ⓘ	Chrysocolla	9.ED.20	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Orthoclase	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Mesolite	9.GA.05	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
ⓘ	Analcime	9.GB.05	Na(AlSi₂O₆) · H₂O
ⓘ	Mordenite	9.GD.35	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
ⓘ	Heulandite-Ca	9.GE.05	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
ⓘ	Heulandite-Na (TL)	9.GE.05	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Unclassified
ⓘ	'Apophyllite Group'	-	AB₄[Si₈O₂₀]X · 8H₂O
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Chlorite Group'	-
ⓘ	'Clay minerals'	-
ⓘ	'Heulandite Subgroup'	-	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
ⓘ	'Limonite'	-
ⓘ	'Monazite Group'	-	REE(PO₄)
ⓘ	'Psilomelane'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
H	ⓘ Apophyllite Group	AB₄[Si₈O₂₀]X · 8H₂O
H	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
H	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
H	ⓘ Bayldonite	PbCu₃(AsO₄)₂(OH)₂
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
H	ⓘ Caledonite	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
H	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
H	ⓘ Conichalcite	CaCu(AsO₄)(OH)
H	ⓘ Duftite	PbCu(AsO₄)(OH)
H	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Gypsum	CaSO₄ · 2H₂O
H	ⓘ Hemimorphite	Zn₄Si₂O₇(OH)₂ · H₂O
H	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
H	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
H	ⓘ Linarite	PbCu(SO₄)(OH)₂
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
H	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Plumbojarosite	Pb_0.5Fe₃³⁺(SO₄)₂(OH)₆
H	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
H	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
H	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Li	Lithium
Li	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
B	Boron
B	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
C	Carbon
C	ⓘ Aragonite	CaCO₃
C	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
C	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
C	ⓘ Calcite	CaCO₃
C	ⓘ Caledonite	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
C	ⓘ Cerussite	PbCO₃
C	ⓘ Dolomite	CaMg(CO₃)₂
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
C	ⓘ Siderite	FeCO₃
C	ⓘ Smithsonite	ZnCO₃
C	ⓘ Calcite var. Argentine	CaCO₃
O	Oxygen
O	ⓘ Quartz var. Agate	SiO₂
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
O	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
O	ⓘ Anglesite	PbSO₄
O	ⓘ Apophyllite Group	AB₄[Si₈O₂₀]X · 8H₂O
O	ⓘ Aragonite	CaCO₃
O	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
O	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
O	ⓘ Baryte	BaSO₄
O	ⓘ Bayldonite	PbCu₃(AsO₄)₂(OH)₂
O	ⓘ Bindheimite	Pb₂Sb₂O₆O
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
O	ⓘ Calcite	CaCO₃
O	ⓘ Caledonite	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
O	ⓘ Cerussite	PbCO₃
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
O	ⓘ Conichalcite	CaCu(AsO₄)(OH)
O	ⓘ Cuprite	Cu₂O
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Duftite	PbCu(AsO₄)(OH)
O	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
O	ⓘ Gypsum	CaSO₄ · 2H₂O
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Hemimorphite	Zn₄Si₂O₇(OH)₂ · H₂O
O	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
O	ⓘ Linarite	PbCu(SO₄)(OH)₂
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Mimetite	Pb₅(AsO₄)₃Cl
O	ⓘ Minium	Pb₃O₄
O	ⓘ Monazite Group	REE(PO₄)
O	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Orthoclase	K(AlSi₃O₈)
O	ⓘ Plumbojarosite	Pb_0.5Fe₃³⁺(SO₄)₂(OH)₆
O	ⓘ Powellite	Ca(MoO₄)
O	ⓘ Quartz	SiO₂
O	ⓘ Romarchite	SnO
O	ⓘ Scheelite	Ca(WO₄)
O	ⓘ Siderite	FeCO₃
O	ⓘ Smithsonite	ZnCO₃
O	ⓘ Titanite	CaTiO(SiO₄)
O	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
O	ⓘ Willemite	Zn₂SiO₄
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
O	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
O	ⓘ Quartz var. Iris Agate	SiO₂
O	ⓘ Calcite var. Argentine	CaCO₃
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Oxyplumboroméite	Pb₂Sb₂O₆O
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Fluorite	CaF₂
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Na	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Na	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Na	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Na	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Na	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Na	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Na	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Mg	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Mg	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Al	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Al	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Al	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Al	ⓘ Orthoclase	K(AlSi₃O₈)
Al	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
Al	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Al	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Si	Silicon
Si	ⓘ Quartz var. Agate	SiO₂
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Si	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
Si	ⓘ Apophyllite Group	AB₄[Si₈O₂₀]X · 8H₂O
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Si	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Si	ⓘ Hemimorphite	Zn₄Si₂O₇(OH)₂ · H₂O
Si	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Si	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Orthoclase	K(AlSi₃O₈)
Si	ⓘ Quartz	SiO₂
Si	ⓘ Titanite	CaTiO(SiO₄)
Si	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
Si	ⓘ Willemite	Zn₂SiO₄
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Si	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Si	ⓘ Quartz var. Iris Agate	SiO₂
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
P	Phosphorus
P	ⓘ Monazite Group	REE(PO₄)
S	Sulfur
S	ⓘ Acanthite	Ag₂S
S	ⓘ Anglesite	PbSO₄
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Baryte	BaSO₄
S	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
S	ⓘ Caledonite	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Covellite	CuS
S	ⓘ Cubanite	CuFe₂S₃
S	ⓘ Digenite	Cu₉S₅
S	ⓘ Galena	PbS
S	ⓘ Gypsum	CaSO₄ · 2H₂O
S	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
S	ⓘ Linarite	PbCu(SO₄)(OH)₂
S	ⓘ Molybdenite	MoS₂
S	ⓘ Plumbojarosite	Pb_0.5Fe₃³⁺(SO₄)₂(OH)₆
S	ⓘ Polybasite	[Ag₆Sb₂S₇][Ag₉CuS₄]
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
S	ⓘ Sphalerite	ZnS
S	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Cl	Chlorine
Cl	ⓘ Chlorargyrite	AgCl
Cl	ⓘ Mimetite	Pb₅(AsO₄)₃Cl
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
K	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Orthoclase	K(AlSi₃O₈)
K	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Ca	Calcium
Ca	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
Ca	ⓘ Aragonite	CaCO₃
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Conichalcite	CaCu(AsO₄)(OH)
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Ca	ⓘ Gypsum	CaSO₄ · 2H₂O
Ca	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Ca	ⓘ Mesolite	Na₂Ca₂Si₉Al₆O₃₀ · 8H₂O
Ca	ⓘ Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O
Ca	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Ca	ⓘ Powellite	Ca(MoO₄)
Ca	ⓘ Scheelite	Ca(WO₄)
Ca	ⓘ Titanite	CaTiO(SiO₄)
Ca	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
Ca	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Ca	ⓘ Heulandite-Na	(Na,Ca,K)₆(Si,Al)₃₆O₇₂ · 22H₂O
Ca	ⓘ Calcite var. Argentine	CaCO₃
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Titanite	CaTiO(SiO₄)
Fe	Iron
Fe	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Cubanite	CuFe₂S₃
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Plumbojarosite	Pb_0.5Fe₃³⁺(SO₄)₂(OH)₆
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Fe	ⓘ Siderite	FeCO₃
Fe	ⓘ Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉
Cu	Copper
Cu	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
Cu	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
Cu	ⓘ Bayldonite	PbCu₃(AsO₄)₂(OH)₂
Cu	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
Cu	ⓘ Caledonite	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Cu	ⓘ Conichalcite	CaCu(AsO₄)(OH)
Cu	ⓘ Covellite	CuS
Cu	ⓘ Cubanite	CuFe₂S₃
Cu	ⓘ Cuprite	Cu₂O
Cu	ⓘ Digenite	Cu₉S₅
Cu	ⓘ Duftite	PbCu(AsO₄)(OH)
Cu	ⓘ Linarite	PbCu(SO₄)(OH)₂
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Cu	ⓘ Polybasite	[Ag₆Sb₂S₇][Ag₉CuS₄]
Cu	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Zn	Zinc
Zn	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
Zn	ⓘ Hemimorphite	Zn₄Si₂O₇(OH)₂ · H₂O
Zn	ⓘ Smithsonite	ZnCO₃
Zn	ⓘ Sphalerite	ZnS
Zn	ⓘ Willemite	Zn₂SiO₄
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
As	ⓘ Bayldonite	PbCu₃(AsO₄)₂(OH)₂
As	ⓘ Conichalcite	CaCu(AsO₄)(OH)
As	ⓘ Duftite	PbCu(AsO₄)(OH)
As	ⓘ Mimetite	Pb₅(AsO₄)₃Cl
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Mo	Molybdenum
Mo	ⓘ Molybdenite	MoS₂
Mo	ⓘ Powellite	Ca(MoO₄)
Ag	Silver
Ag	ⓘ Acanthite	Ag₂S
Ag	ⓘ Chlorargyrite	AgCl
Ag	ⓘ Polybasite	[Ag₆Sb₂S₇][Ag₉CuS₄]
Ag	ⓘ Native Silver	Ag
Sn	Tin
Sn	ⓘ Romarchite	SnO
Sb	Antimony
Sb	ⓘ Bindheimite	Pb₂Sb₂O₆O
Sb	ⓘ Polybasite	[Ag₆Sb₂S₇][Ag₉CuS₄]
Sb	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Sb	ⓘ Oxyplumboroméite	Pb₂Sb₂O₆O
Ba	Barium
Ba	ⓘ Baryte	BaSO₄
W	Tungsten
W	ⓘ Scheelite	Ca(WO₄)
Pb	Lead
Pb	ⓘ Anglesite	PbSO₄
Pb	ⓘ Bayldonite	PbCu₃(AsO₄)₂(OH)₂
Pb	ⓘ Bindheimite	Pb₂Sb₂O₆O
Pb	ⓘ Caledonite	Pb₅Cu₂(SO₄)₃(CO₃)(OH)₆
Pb	ⓘ Cerussite	PbCO₃
Pb	ⓘ Duftite	PbCu(AsO₄)(OH)
Pb	ⓘ Galena	PbS
Pb	ⓘ Linarite	PbCu(SO₄)(OH)₂
Pb	ⓘ Mimetite	Pb₅(AsO₄)₃Cl
Pb	ⓘ Minium	Pb₃O₄
Pb	ⓘ Plumbojarosite	Pb_0.5Fe₃³⁺(SO₄)₂(OH)₆
Pb	ⓘ Oxyplumboroméite	Pb₂Sb₂O₆O

Fossils

There are 14 fossil localities from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences

Youngest Fossil Listed

48.6 Ma (Eocene)

Oldest Fossil Listed

513 Ma (Cambrian)

Stratigraphic Units

Unit	No. Occurrences	Age
Challis Volcanics - Germer Tuffaceous	5	55.8 - 48.6 Ma (Eocene)
Saturday Mountain	8	449.5 - 443.4 Ma (Paleozoic)
Bayhorse Red Siltstone	1	513 - 505 Ma (Cambrian)

Fossils from Region

Click here to show the list.

Accepted Name	Hierarchy	Age
Primaspis genus	Animalia : Arthropoda : Trilobita : Lichida : Odontopleuridae : *Primaspis*	485.4 - 443.4 Ma Paleozoic
Ampyxina genus	Animalia : Arthropoda : Trilobita : Asaphida : Raphiophoridae : *Ampyxina*	485.4 - 443.4 Ma Paleozoic
Toernquistia genus	Animalia : Arthropoda : Trilobita : Proetida : Dimeropygidae : *Toernquistia*	485.4 - 443.4 Ma Paleozoic
Lingulida order	Animalia : Brachiopoda : Lingulata : Lingulida	485.4 - 443.4 Ma Paleozoic
Climacograptus genus	Animalia : Hemichordata : Pterobranchia : Diplograptidae : *Climacograptus*	485.4 - 443.4 Ma Paleozoic
Dicranograptus genus	Animalia : Hemichordata : Graptolithina : Bireclinata : *Dicranograptus*	485.4 - 443.4 Ma Paleozoic
Glyptograptus genus	Animalia : Hemichordata : Graptolithina : Bireclinata : Retiolitidae : *Glyptograptus*	485.4 - 443.4 Ma Paleozoic
Orthograptus genus	Animalia : Hemichordata : Graptolithina : Diplograptoidea : Diplograptidae : *Orthograptus*	485.4 - 443.4 Ma Paleozoic
Equisetum genus	Plantae : Tracheophyta : Polypodiopsida : Equisetales : Equisetaceae : *Equisetum*	55.8 - 48.6 Ma Eocene
Dennstaedtia americana species	Plantae : Tracheophyta : Polypodiopsida : Polypodiales : Dennstaedtiaceae : Dennstaedtia : *Dennstaedtia americana*	55.8 - 48.6 Ma Eocene
Equisetum arcticum species	Plantae : Tracheophyta : Polypodiopsida : Equisetales : Equisetaceae : Equisetum : *Equisetum arcticum*	55.8 - 48.6 Ma Eocene
Comptonia genus	Plantae : Tracheophyta : Magnoliopsida : Fagales : Myricaceae : *Comptonia*	55.8 - 48.6 Ma Eocene
Gogia hobbsi species	Animalia : Echinodermata : Eocrinoidea : Gogiida : Eocrinidae : Gogia : *Gogia hobbsi*	513 - 505 Ma Cambrian
Conites genus	Plantae : Cycadeoideophyta : Cycadeoideopsida : Cycadeoideales : *Conites*	55.8 - 48.6 Ma Eocene

Fossil Localities

Click to show 3 fossil localities

USA

Idaho
- Custer County
  - Cambrian🐚 CL-1
  - Eocene🐚 Germer Basin flora P-32
  - Paleozoic🐚 Saturday Mtn.Farm

Localities in this Region

USA

Idaho
- Custer County
  - Bay Horse Mining District

USA

Idaho
- Custer County
  - Bay Horse Mining District

Other Regions, Features and Areas that Intersect

North AmericaContinent

Rocky MountainsMountain Range

North America PlateTectonic Plate

USA

Idaho
- Sawtooth National Recreation AreaProtected Area
Sawtooth National ForestNational Forest

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

Ream, Lanny R. (1995) Idaho: Mineral Locality Index. Rocks & Minerals, 70 (4) 242-263 doi:10.1080/00357529.1995.9926628

Quick NavTop Commodities Mineral List Rock Types Fossils Localities in Region Other Regions References

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: October 21, 2026 21:07:18 Page updated: September 24, 2026 22:19:23

Go to top of page

Bay Horse Mining District, Custer County, Idaho, USAiRegional Level TypesBay Horse Mining DistrictMining District Custer CountyCounty IdahoState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

Select Mineral List Type

Commodity List

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Fossils

Localities in this Region

Other Regions, Features and Areas that Intersect

References

Bay Horse Mining District, Custer County, Idaho, USA i
Regional Level Types
Bay Horse Mining District Mining District
Custer County County
Idaho State
USA Country