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Devils Head Pegmatite Mining District, Douglas Co., Colorado, USAi
Regional Level Types
Devils Head Pegmatite Mining DistrictMining District
Douglas Co.County
ColoradoState
USACountry

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Key
Latitude & Longitude (WGS84):
39° North , 104° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~42km
Locality type:


Devils Head is a prominent peak in the Rampart Range. It is easily reached from Sedalia on State Highway 85 via U.S. Highway 67 (Jarre Canyon Road) and Rampart Range road; the distance from Sedalia is 21.5 mi. It can also be reached from Colorado Springs by way of U.S. Highway 24 to Woodland Park, then along Rampart Range Road. This locality has at times been under claim by local mineral clubs.

In 1880s a pocket 50 feet long, 4 to 15 feet wide and 4 feet thick produced many crystals of topaz, microcline, cassiterite and fluorite.

2017 Update: Log Jumper trail head digs have been claimed. The claims are in popular dig sites that are within ½ mile of Rampart Range Road, on the west side starting from the trail head post. Please note that these digs are also no longer open to the public and there are now mining hazards in the area.

Select Mineral List Type

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

22 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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
'Albite-Anorthite Series'
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 24 (Table A-1).
Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Bertrandite
Formula: Be4(Si2O7)(OH)2
Reference: Minerals of Colorado (1997) Eckel, E. B.
Beryl
Formula: Be3Al2(Si6O18)
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 24 (Table A-1).
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Localities: Reported from at least 11 localities in this region.
Cassiterite
Formula: SnO2
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Fayalite
Formula: Fe2+2SiO4
Reference: Minerals of Colorado (1997) Eckel, E. B.
'Feldspar Group'
'Feldspar Group var: Perthite'
Reference: Minerals of Colorado (1997) Eckel, E. B.
'Fergusonite'
Fergusonite-(Y)
Formula: YNbO4
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Fluorite
Formula: CaF2
Localities: Reported from at least 12 localities in this region.
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Fluorite var: Yttrocerite
Formula: (Ca,Y,Ce)F2+x
Fluorite var: Yttrofluorite
Formula: (Ca1-xYx)F2+x where 0.05< x <0.3
Reference: Minerals of Colorado (1997) Eckel, E. B.
Gadolinite-(Y)
Formula: Y2Fe2+Be2Si2O10
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 24 (Table A-1).
Hematite
Formula: Fe2O3
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Hematite var: Martite
Formula: Fe2O3
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
'K Feldspar'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Manganite
Formula: Mn3+O(OH)
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Microcline
Formula: K(AlSi3O8)
Localities: Reported from at least 20 localities in this region.
Microcline var: Amazonite
Formula: K(AlSi3O8)
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
'Monazite'
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
'Parisite'
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 25 (Table A-1).
Polylithionite
Formula: KLi2Al(Si4O10)(F,OH)2
Reference: American Mineralogist, Vol. 85, pp. 1275-1286, 2000.
'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
Pyrolusite
Formula: Mn4+O2
Reference: Minerals of Colorado (1997) E.B. Eckel
Quartz
Formula: SiO2
Localities: Reported from at least 12 localities in this region.
Quartz var: Amethyst
Formula: SiO2
Reference: Minerals of Colorado (1997) E.B. Eckel
Quartz var: Citrine
Formula: SiO2
Reference: Minerals of Colorado (1997) E.B. Eckel
Quartz var: Smoky Quartz
Formula: SiO2
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Samarskite-(Y)
Formula: YFe3+Nb2O8
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Thorite
Formula: Th(SiO4)
Topaz
Formula: Al2(SiO4)(F,OH)2
Localities: Reported from at least 6 localities in this region.
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Xenotime-(Y)
Formula: Y(PO4)
Reference: Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 25 (Table A-1).
Zircon
Formula: Zr(SiO4)
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997
Zircon var: Cyrtolite
Formula: Zr[(SiO4),(OH)4]
Reference: "Minerals of Colorado, updated & revised", p. 13, by Eckel, Edwin B., 1997

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
var: Yttrocerite3.AB.25(Ca,Y,Ce)F2+x
var: Yttrofluorite3.AB.25(Ca1-xYx)F2+x where 0.05< x <0.3
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Euxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Hematite4.CB.05Fe2O3
var: Martite4.CB.05Fe2O3
Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
Manganite4.FD.15Mn3+O(OH)
'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Citrine4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Samarskite-(Y)4.DB.25YFe3+Nb2O8
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Fergusonite-(Y)7.GA.05YNbO4
Group 8 - Phosphates, Arsenates and Vanadates
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
Allanite-(Ce)9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Fayalite9.AC.05Fe2+2SiO4
Gadolinite-(Y)9.AJ.20Y2Fe2+Be2Si2O10
Microcline9.FA.30K(AlSi3O8)
var: Amazonite9.FA.30K(AlSi3O8)
Polylithionite9.EC.20KLi2Al(Si4O10)(F,OH)2
Thorite9.AD.30Th(SiO4)
Topaz9.AF.35Al2(SiO4)(F,OH)2
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Feldspar Group'-
'var: Perthite'-
'Fergusonite'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'Monazite'-
'Parisite'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Cassiterite4.4.1.5SnO2
Pyrolusite4.4.1.4Mn4+O2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Manganite6.1.3.1Mn3+O(OH)
Group 7 - MULTIPLE OXIDES
AB8X16
Hollandite7.9.1.1Ba(Mn4+6Mn3+2)O16
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Fergusonite-(Y)8.1.1.1YNbO4
Samarskite-(Y)8.1.11.1YFe3+Nb2O8
A2B2O6(O,OH,F)
'Pyrochlore Group'8.2.1.1A2Nb2(O,OH)6Z
AB2O6
Euxenite-(Y)8.3.8.2(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Fayalite51.3.1.1Fe2+2SiO4
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Gadolinite-(Y)54.2.1b.3Y2Fe2+Be2Si2O10
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Allanite-(Ce)58.2.1a.1{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Polylithionite71.2.2b.8KLi2Al(Si4O10)(F,OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Albite
var: Cleavelandite
-Na(AlSi3O8)
'Albite-Anorthite Series'-
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Feldspar Group'-
'var: Perthite'-
'Fergusonite'-
Fluorite
var: Yttrocerite
-(Ca,Y,Ce)F2+x
var: Yttrofluorite-(Ca1-xYx)F2+x where 0.05< x <0.3
'Garnet Group'-X3Z2(SiO4)3
Hematite
var: Martite
-Fe2O3
'K Feldspar'-
Microcline
var: Amazonite
-K(AlSi3O8)
'Monazite'-
'Parisite'-
Quartz
var: Amethyst
-SiO2
var: Citrine-SiO2
var: Smoky Quartz-SiO2
Xenotime-(Y)-Y(PO4)
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H ManganiteMn3+O(OH)
H TopazAl2(SiO4)(F,OH)2
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H Pyrochlore GroupA2Nb2(O,OH)6Z
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
H PolylithioniteKLi2Al(Si4O10)(F,OH)2
H BertranditeBe4(Si2O7)(OH)2
LiLithium
Li PolylithioniteKLi2Al(Si4O10)(F,OH)2
BeBeryllium
Be Gadolinite-(Y)Y2Fe2+Be2Si2O10
Be BerylBe3Al2(Si6O18)
Be BertranditeBe4(Si2O7)(OH)2
OOxygen
O AlbiteNa(AlSi3O8)
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O Microcline (var: Amazonite)K(AlSi3O8)
O CassiteriteSnO2
O Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
O Fergusonite-(Y)YNbO4
O Gadolinite-(Y)Y2Fe2+Be2Si2O10
O Hematite (var: Martite)Fe2O3
O HollanditeBa(Mn64+Mn23+)O16
O ManganiteMn3+O(OH)
O Quartz (var: Smoky Quartz)SiO2
O Samarskite-(Y)YFe3+Nb2O8
O TopazAl2(SiO4)(F,OH)2
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O Garnet GroupX3Z2(SiO4)3
O Pyrochlore GroupA2Nb2(O,OH)6Z
O BerylBe3Al2(Si6O18)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O Albite (var: Cleavelandite)Na(AlSi3O8)
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O ThoriteTh(SiO4)
O Xenotime-(Y)Y(PO4)
O MicroclineK(AlSi3O8)
O PolylithioniteKLi2Al(Si4O10)(F,OH)2
O QuartzSiO2
O BertranditeBe4(Si2O7)(OH)2
O FayaliteFe22+SiO4
O PyrolusiteMn4+O2
O Quartz (var: Amethyst)SiO2
O Quartz (var: Citrine)SiO2
O HematiteFe2O3
O ZirconZr(SiO4)
FFluorine
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
F Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F PolylithioniteKLi2Al(Si4O10)(F,OH)2
F Fluorite (var: Yttrofluorite)(Ca1-xYx)F2+x where 0.05< x <0.3
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite (var: Cleavelandite)Na(AlSi3O8)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al Microcline (var: Amazonite)K(AlSi3O8)
Al TopazAl2(SiO4)(F,OH)2
Al BerylBe3Al2(Si6O18)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Al MicroclineK(AlSi3O8)
Al PolylithioniteKLi2Al(Si4O10)(F,OH)2
SiSilicon
Si AlbiteNa(AlSi3O8)
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si Microcline (var: Amazonite)K(AlSi3O8)
Si Gadolinite-(Y)Y2Fe2+Be2Si2O10
Si Quartz (var: Smoky Quartz)SiO2
Si TopazAl2(SiO4)(F,OH)2
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si Garnet GroupX3Z2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si ThoriteTh(SiO4)
Si MicroclineK(AlSi3O8)
Si PolylithioniteKLi2Al(Si4O10)(F,OH)2
Si QuartzSiO2
Si BertranditeBe4(Si2O7)(OH)2
Si FayaliteFe22+SiO4
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Citrine)SiO2
Si ZirconZr(SiO4)
PPhosphorus
P Xenotime-(Y)Y(PO4)
KPotassium
K Microcline (var: Amazonite)K(AlSi3O8)
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K MicroclineK(AlSi3O8)
K PolylithioniteKLi2Al(Si4O10)(F,OH)2
CaCalcium
Ca Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ca FluoriteCaF2
Ca Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ca Fluorite (var: Yttrofluorite)(Ca1-xYx)F2+x where 0.05< x <0.3
TiTitanium
Ti Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
MnManganese
Mn HollanditeBa(Mn64+Mn23+)O16
Mn ManganiteMn3+O(OH)
Mn PyrolusiteMn4+O2
FeIron
Fe Gadolinite-(Y)Y2Fe2+Be2Si2O10
Fe Hematite (var: Martite)Fe2O3
Fe Samarskite-(Y)YFe3+Nb2O8
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Fe FayaliteFe22+SiO4
Fe HematiteFe2O3
YYttrium
Y Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Y Fergusonite-(Y)YNbO4
Y Gadolinite-(Y)Y2Fe2+Be2Si2O10
Y Samarskite-(Y)YFe3+Nb2O8
Y Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
Y Xenotime-(Y)Y(PO4)
Y Fluorite (var: Yttrofluorite)(Ca1-xYx)F2+x where 0.05< x <0.3
ZrZirconium
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Zr ZirconZr(SiO4)
NbNiobium
Nb Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Nb Fergusonite-(Y)YNbO4
Nb Samarskite-(Y)YFe3+Nb2O8
Nb Pyrochlore GroupA2Nb2(O,OH)6Z
SnTin
Sn CassiteriteSnO2
BaBarium
Ba HollanditeBa(Mn64+Mn23+)O16
CeCerium
Ce Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ce Fluorite (var: Yttrocerite)(Ca,Y,Ce)F2+x
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
TaTantalum
Ta Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ThThorium
Th Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Th ThoriteTh(SiO4)
UUranium
U Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A) In-text Citation No.
Eckel, E.B. (1997), Minerals of Colorado, updated & revised: 13.

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