Ref.: Eckel, Edwin B. (1997), Minerals of Colorado, updated & revised: 16. This old mine, known since Cross (1884), is near the valley floor on the southern slopes of Gem Mountain on the North side of Gem Park (N ½ sec. 33, T. 47 S., R. 73 W.).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ 'Ancylite'

12 valid minerals.

Detailed Mineral List:

ⓘ 'Ancylite'

References:

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

ⓘ Annabergite

Formula: Ni₃(AsO₄)₂ · 8H₂O

References:

USGS Prof Paper 649

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Baryte

Formula: BaSO₄

References:

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

ⓘ Bornite

Formula: Cu₅FeS₄

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Calcite

Formula: CaCO₃

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Chalcocite

Formula: Cu₂S

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Maucherite

Formula: Ni₁₁As₈

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ 'Monazite'

Formula: REE(PO₄)

References:

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

ⓘ Nickeline

Formula: NiAs

References:

USGS Prof Paper 649

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Phlogopite

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

References:

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

ⓘ Pyrite

Formula: FeS₂

References:

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Quartz

Formula: SiO₂

References:

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

ⓘ Silver ?

Formula: Ag

References:

USGS Prof Paper 649

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Silver ?	1.AA.05	Ag
Group 2 - Sulphides and Sulfosalts
ⓘ	Maucherite	2.AB.15	Ni₁₁As₈
ⓘ	Chalcocite	2.BA.05	Cu₂S
ⓘ	Bornite	2.BA.15	Cu₅FeS₄
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Nickeline	2.CC.05	NiAs
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Annabergite	8.CE.40	Ni₃(AsO₄)₂ · 8H₂O
Group 9 - Silicates
ⓘ	Phlogopite	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
Unclassified
ⓘ	'Monazite'	-	REE(PO₄)
ⓘ	'Ancylite'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Annabergite	Ni₃(AsO₄)₂ · 8H₂O
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Annabergite	Ni₃(AsO₄)₂ · 8H₂O
O	ⓘ Baryte	BaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Monazite	REE(PO₄)
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
Mg	Magnesium
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	Aluminium
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
P	Phosphorus
P	ⓘ Monazite	REE(PO₄)
S	Sulfur
S	ⓘ Baryte	BaSO₄
S	ⓘ Bornite	Cu₅FeS₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Chalcocite	Cu₂S
S	ⓘ Pyrite	FeS₂
K	Potassium
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Fe	Iron
Fe	ⓘ Bornite	Cu₅FeS₄
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Pyrite	FeS₂
Ni	Nickel
Ni	ⓘ Annabergite	Ni₃(AsO₄)₂ · 8H₂O
Ni	ⓘ Maucherite	Ni₁₁As₈
Ni	ⓘ Nickeline	NiAs
Cu	Copper
Cu	ⓘ Bornite	Cu₅FeS₄
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chalcocite	Cu₂S
As	Arsenic
As	ⓘ Annabergite	Ni₃(AsO₄)₂ · 8H₂O
As	ⓘ Maucherite	Ni₁₁As₈
As	ⓘ Nickeline	NiAs
Ag	Silver
Ag	ⓘ Silver	Ag
Ba	Barium
Ba	ⓘ Baryte	BaSO₄

Other Regions, Features and Areas containing this locality

North America

Rocky MountainsMountain Range

North America PlateTectonic Plate

Great Plains DomainDomain

USA

Central Colorado–Taos TroughBasin

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References

Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F

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Gem Mine, Gem Park complex, Fremont County, Colorado, USAiRegional Level TypesGem MineMine Gem Park complexComplex Fremont CountyCounty ColoradoState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Gem Mine, Gem Park complex, Fremont County, Colorado, USA i
Regional Level Types
Gem Mine Mine
Gem Park complex Complex
Fremont County County
Colorado State
USA Country