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Big Boulder Mine (Big Boulder Beryl Mine), Crystal Mountain Pegmatite Mining District (Storm Mountain Mining District), Larimer County, Colorado, USAi
Regional Level Types
Big Boulder Mine (Big Boulder Beryl Mine)Mine
Crystal Mountain Pegmatite Mining District (Storm Mountain Mining District)Mining District
Larimer CountyCounty
ColoradoState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
40° 31' 16'' North , 105° 24' 31'' West
Latitude & Longitude (decimal):
40.52119,-105.40887
GeoHash:
G#: 9xjn92et5
GRN:
N28W57
Type:
Mine
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Estes Park6,257 (2017)18.6km
Laporte2,450 (2015)25.6km
Fort Collins161,175 (2017)28.3km
Loveland75,182 (2017)31.4km
Campion1,839 (2006)33.9km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Fort Collins RockhoundsFort Collins, Colorado28km
Mindat Locality ID:
8684
Long-form identifier:
mindat:1:2:8684:7
GUID (UUID V4):
b2bf4985-f3d8-42ec-a3ec-dc4f0eb70e2a


A Mica-U-Be(beryl)-feldspar-Li occurrence/mine located in the S½SE¼ sec. 36, T7N, R72W, 6th Principal Meridian.

Mineralization is a zoned pegmatite body concordant to mica schist.

Workings include surface and underground openings comprised of 2 open cuts, a shaft, several small pits and 5 drill holes.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


20 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Alluaudite
Formula: (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Autunite
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
ⓘ Beryl
Formula: Be3Al2(Si6O18)
ⓘ 'Dravite-Schorl Series'
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Graftonite
Formula: Fe2+Fe2+2(PO4)2
ⓘ 'Gummite'
ⓘ Hydroxylapatite
Formula: Ca5(PO4)3(OH)
ⓘ Leucophosphite
Formula: KFe3+2(PO4)2(OH) · 2H2O
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Phosphosiderite
Formula: FePO4 · 2H2O
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Purpurite
Formula: Mn3+(PO4)
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
ⓘ Spodumene
Formula: LiAlSi2O6
ⓘ 'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
ⓘ Tantalite-(Fe)
Formula: Fe2+Ta2O6
ⓘ Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
ⓘ Triphylite
Formula: LiFe2+PO4
ⓘ Triphylite var. Ferrisicklerite
Formula: Li1-x(Fe3+xFe2+1-x)PO4
ⓘ Triplite
Formula: Mn2+2(PO4)F
ⓘ Uraninite
Formula: UO2
ⓘ Vivianite
Formula: Fe2+Fe2+2(PO4)2 · 8H2O

Gallery:

Mn3+(PO4)ⓘ Purpurite
AD3G6 (T6O18)(BO3)3X3Zⓘ 'Tourmaline'

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
ⓘTantalite-(Fe)4.DB.35Fe2+Ta2O6
ⓘUraninite4.DL.05UO2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘPurpurite8.AB.10Mn3+(PO4)
ⓘTriphylite8.AB.10LiFe2+PO4
ⓘvar. Ferrisicklerite8.AB.10Li1-x(Fe3+xFe2+1-x)PO4
ⓘGraftonite8.AB.20Fe2+Fe2+2(PO4)2
ⓘAlluaudite8.AC.10(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
ⓘTriplite8.BB.10Mn2+2(PO4)F
ⓘHydroxylapatite8.BN.05Ca5(PO4)3(OH)
ⓘFluorapatite8.BN.05Ca5(PO4)3F
ⓘPhosphosiderite8.CD.05FePO4 · 2H2O
ⓘVivianite8.CE.40Fe2+Fe2+2(PO4)2 · 8H2O
ⓘLeucophosphite8.DH.10KFe3+2(PO4)2(OH) · 2H2O
ⓘAutunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
ⓘTorbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
ⓘBeryl9.CJ.05Be3Al2(Si6O18)
ⓘSpodumene9.DA.30LiAlSi2O6
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
ⓘ'Gummite'-
ⓘ'Dravite-Schorl Series'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Hⓘ HydroxylapatiteCa5(PO4)3(OH)
Hⓘ LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PhosphosideriteFePO4 · 2H2O
Hⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Hⓘ VivianiteFe2+Fe22+(PO4)2 · 8H2O
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
LiLithium
Liⓘ Triphylite var. FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
Liⓘ SpodumeneLiAlSi2O6
Liⓘ TriphyliteLiFe2+PO4
BeBeryllium
Beⓘ BerylBe3Al2(Si6O18)
BBoron
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Oⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Triphylite var. FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
Oⓘ Tantalite-(Fe)Fe2+Ta2O6
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ GraftoniteFe2+Fe22+(PO4)2
Oⓘ HydroxylapatiteCa5(PO4)3(OH)
Oⓘ LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Oⓘ MicroclineK(AlSi3O8)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PhosphosideriteFePO4 · 2H2O
Oⓘ PurpuriteMn3+(PO4)
Oⓘ QuartzSiO2
Oⓘ Quartz var. Smoky QuartzSiO2
Oⓘ SpodumeneLiAlSi2O6
Oⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Oⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ TriphyliteLiFe2+PO4
Oⓘ TripliteMn22+(PO4)F
Oⓘ UraniniteUO2
Oⓘ VivianiteFe2+Fe22+(PO4)2 · 8H2O
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
Fⓘ TripliteMn22+(PO4)F
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SpodumeneLiAlSi2O6
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Quartz var. Smoky QuartzSiO2
Siⓘ SpodumeneLiAlSi2O6
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Garnet GroupX3Z2(SiO4)3
PPhosphorus
Pⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Pⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Pⓘ Triphylite var. FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
Pⓘ FluorapatiteCa5(PO4)3F
Pⓘ GraftoniteFe2+Fe22+(PO4)2
Pⓘ HydroxylapatiteCa5(PO4)3(OH)
Pⓘ LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Pⓘ PhosphosideriteFePO4 · 2H2O
Pⓘ PurpuriteMn3+(PO4)
Pⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Pⓘ TriphyliteLiFe2+PO4
Pⓘ TripliteMn22+(PO4)F
Pⓘ VivianiteFe2+Fe22+(PO4)2 · 8H2O
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Caⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ HydroxylapatiteCa5(PO4)3(OH)
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
MnManganese
Mnⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Mnⓘ PurpuriteMn3+(PO4)
Mnⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Mnⓘ TripliteMn22+(PO4)F
FeIron
Feⓘ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Feⓘ Triphylite var. FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
Feⓘ Tantalite-(Fe)Fe2+Ta2O6
Feⓘ GraftoniteFe2+Fe22+(PO4)2
Feⓘ LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Feⓘ PhosphosideriteFePO4 · 2H2O
Feⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Feⓘ TriphyliteLiFe2+PO4
Feⓘ VivianiteFe2+Fe22+(PO4)2 · 8H2O
CuCopper
Cuⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
NbNiobium
Nbⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
TaTantalum
Taⓘ Tantalite-(Fe)Fe2+Ta2O6
Taⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
UUranium
Uⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Uⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Uⓘ UraniniteUO2

Other Databases

Link to USGS MRDS:10087851

Other Regions, Features and Areas containing this locality

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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

(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0080690026
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 Bureau of Mines Information Circular 8298: 29 (Table A-1).
Rocks & Minerals (1987): 62: 234-235.
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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