Roscoe Beryl Mine (Roscoe pegmatite), Clear Creek pegmatite Province, Jefferson County, Colorado, USA i
Regional Level Types
Roscoe Beryl Mine (Roscoe pegmatite) Mine
Clear Creek pegmatite Province Province
Jefferson County County
Colorado State
USA Country

Regional Level Types
Roscoe Beryl Mine (Roscoe pegmatite)	Mine
Clear Creek pegmatite Province	Province
Jefferson County	County
Colorado	State
USA	Country

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Latitude & Longitude (WGS84):

39° 44' 15'' North , 105° 21' 27'' West

Latitude & Longitude (decimal):

G#: 9xj449cp8

Type:

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Genesee	3,609 (2011)	9.2km
Kittredge	1,304 (2011)	10.4km
Golden	20,330 (2017)	11.8km
Evergreen	9,038 (2011)	12.1km
Idledale	252 (2011)	12.5km

Nearest Clubs:
Local clubs are the best way to get access to collecting localities

Club	Location	Distance
Colorado Mineral Society	Lakewood, Colorado	24km
Mile High Rock and Mineral Society	Arvada, Colorado	24km
Flatirons Mineral Club	Boulder, Colorado	32km
Denver Gem and Mineral Guild	Denver, Colorado	32km
Friends of Mineralogy - Colorado Chapter	Denver, Colorado	32km

Mindat Locality ID:

6280

Long-form identifier:

mindat:1:2:6280:3

GUID (UUID V4):

7a022f0c-45f1-4759-82b5-27c7d30260d9

A pegmatite located in N½ sec. 5, T. 4 S., R. 71 W. It is exposed by a roadcut along U.S. Highway 6 in Clear Creek Canyon, 3 mi east of the fork between U.S. 6 and the road to Black Hawk (State Highway 119). Much of the deposit has been removed by excavation for the highway, but several smaller dikes crop out on the hill above the roadcuts.

Mineralization is a zoned pegmatite structure in biotite granite gneiss.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

14 valid minerals.

Detailed Mineral List:

ⓘ 'Allanite Group'

Formula: (A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

References:

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

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 28 (Table A-1).

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

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

ⓘ Fergusonite-(Y)

Formula: YNbO₄

References:

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

ⓘ Ferrimolybdite

Formula: Fe₂(MoO₄)₃ · nH₂O

References:

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

ⓘ Gadolinite-(Ce)

Formula: (Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

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

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 28 (Table A-1).

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 28 (Table A-1).

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

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

ⓘ Molybdenite

Formula: MoS₂

References:

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

ⓘ 'Monazite'

Formula: REE(PO₄)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 28 (Table A-1).

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

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

ⓘ Quartz

Formula: SiO₂

References:

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

ⓘ Samarskite-(Y)

Formula: YFe³⁺Nb₂O₈

References:

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

ⓘ Tengerite-(Y) ?

Formula: Y₂(CO₃)₃ · 2-3H₂O

Description: The cited reference indicated that the identity was uncertain and that the mineral could be one out of a number of species.

References:

Minerals of Colorado (1997) Eckels, E. B.

ⓘ Uraninite

Formula: UO₂

References:

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

ⓘ Xenotime-(Y)

Formula: Y(PO₄)

References:

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 28 (Table A-1).

ⓘ Yttrotantalite-(Y)

Formula: (Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄

References:

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 2 - Sulphides and Sulfosalts
ⓘ	Molybdenite	2.EA.30	MoS₂
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Samarskite-(Y)	4.DB.25	YFe³⁺Nb₂O₈
ⓘ	Yttrotantalite-(Y)	4.DG.10	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
ⓘ	Uraninite	4.DL.05	UO₂
Group 5 - Nitrates and Carbonates
ⓘ	Tengerite-(Y) ?	5.CC.10	Y₂(CO₃)₃ · 2-3H₂O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Fergusonite-(Y)	7.GA.05	YNbO₄
ⓘ	Ferrimolybdite	7.GB.30	Fe₂(MoO₄)₃ · nH₂O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Xenotime-(Y)	8.AD.35	Y(PO₄)
Group 9 - Silicates
ⓘ	Gadolinite-(Ce)	9.AJ.20	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
Unclassified
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Monazite'	-	REE(PO₄)
ⓘ	'Allanite Group'	-	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Ferrimolybdite	Fe₂(MoO₄)₃ · nH₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Tengerite-(Y)	Y₂(CO₃)₃ · 2-3H₂O
H	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
H	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Be	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
C	Carbon
C	ⓘ Tengerite-(Y)	Y₂(CO₃)₃ · 2-3H₂O
O	Oxygen
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Fergusonite-(Y)	YNbO₄
O	ⓘ Ferrimolybdite	Fe₂(MoO₄)₃ · nH₂O
O	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Monazite	REE(PO₄)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
O	ⓘ Tengerite-(Y)	Y₂(CO₃)₃ · 2-3H₂O
O	ⓘ Uraninite	UO₂
O	ⓘ Xenotime-(Y)	Y(PO₄)
O	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	Aluminium
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
P	Phosphorus
P	ⓘ Monazite	REE(PO₄)
P	ⓘ Xenotime-(Y)	Y(PO₄)
S	Sulfur
S	ⓘ Molybdenite	MoS₂
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	Iron
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Ferrimolybdite	Fe₂(MoO₄)₃ · nH₂O
Fe	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Fe	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
Y	Yttrium
Y	ⓘ Fergusonite-(Y)	YNbO₄
Y	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
Y	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Y	ⓘ Tengerite-(Y)	Y₂(CO₃)₃ · 2-3H₂O
Y	ⓘ Xenotime-(Y)	Y(PO₄)
Y	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
Nb	Niobium
Nb	ⓘ Fergusonite-(Y)	YNbO₄
Nb	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Nb	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
Mo	Molybdenum
Mo	ⓘ Ferrimolybdite	Fe₂(MoO₄)₃ · nH₂O
Mo	ⓘ Molybdenite	MoS₂
La	Lanthanum
La	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
Ce	Cerium
Ce	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
Nd	Neodymium
Nd	ⓘ Gadolinite-(Ce)	(Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀
Ta	Tantalum
Ta	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
U	Uranium
U	ⓘ Uraninite	UO₂
U	ⓘ Yttrotantalite-(Y)	(Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄

Other Regions, Features and Areas containing this locality

North America

Rocky MountainsMountain Range

North America PlateTectonic Plate

Great Plains DomainDomain

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References

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

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