Vote for your favorite mineral in #MinCup26! - Bournonite vs. Vesuvianite
Cogwheels of bournonite are up against colourful vesuvianite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Central Mining District, Boulder County, Colorado, USAi
Regional Level Types
Central Mining DistrictMining District
Boulder CountyCounty
ColoradoState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
00771620017272062647868.jpg
Britholite-(Ce)

Central Mining District, Boulder County, Colorado, USA
00771620017272062647868.jpg
Britholite-(Ce)

Central Mining District, Boulder County, Colorado, USA
00591830017272011809398.jpg
Britholite-(Ce)

Central Mining District, Boulder County, Colorado, USA
Latitude & Longitude (WGS84):
40° North , 105° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~34km
GRN:
N27W59
Type:
Mining District
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Mindat Locality ID:
31945
Long-form identifier:
mindat:1:2:31945:1
GUID (UUID V4):
0


Location: T1-2N R71-72W; 7 miles NW of Boulder; in the area around Central Gulch, a tributary of South St. Vrain Creek.

Description: Also referred to as the Utillah district, which was probably the Central district’s original name; also refers to the Enterprise district; name used in the records of the US Surveyor General in Denver up to 1924 (Henderson 1926); used as the preferred name by Vanderwilt (1947). The district includes the Crescent, Grand Union and St. Mary’s mines and the Elkhorn mineral monument. Gold, telluride and silver ores, along with lead and some copper and zinc have been produced.

Select Mineral List Type

Standard Detailed Gallery Strunz 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

9 valid minerals.

Rock Types Recorded

Note: 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:

ⓘ Autunite
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
ⓘ Bassetite
Formula: Fe2+(UO2)2(PO4)2 · 10H2O
ⓘ Coffinite
Formula: U(SiO4) · nH2O
ⓘ Galena
Formula: PbS
ⓘ Pyrite
Formula: FeS2
ⓘ Sphalerite
Formula: ZnS
ⓘ Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
ⓘ Uraninite
Formula: UO2
ⓘ Uraninite var. Pitchblende
Formula: UO2
ⓘ Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘUraninite
var. Pitchblende		4.DL.05UO2
ⓘ4.DL.05UO2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘAutunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
ⓘTorbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
ⓘBassetite8.EB.10Fe2+(UO2)2(PO4)2 · 10H2O
Group 9 - Silicates
ⓘCoffinite9.AD.30U(SiO4) · nH2O
ⓘUranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O

List of minerals for each chemical element

HHydrogen
Hⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Hⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Hⓘ CoffiniteU(SiO4) · nH2O
Hⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Hⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
OOxygen
Oⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Oⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Oⓘ CoffiniteU(SiO4) · nH2O
Oⓘ Uraninite var. PitchblendeUO2
Oⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Oⓘ UraniniteUO2
Oⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
SiSilicon
Siⓘ CoffiniteU(SiO4) · nH2O
Siⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
PPhosphorus
Pⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Pⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Pⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
SSulfur
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
CaCalcium
Caⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Caⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
FeIron
Feⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Feⓘ PyriteFeS2
CuCopper
Cuⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
Znⓘ SphaleriteZnS
PbLead
Pbⓘ GalenaPbS
UUranium
Uⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Uⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Uⓘ CoffiniteU(SiO4) · nH2O
Uⓘ Uraninite var. PitchblendeUO2
Uⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Uⓘ UraniniteUO2
Uⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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

[1]Dunn, L. G. (2003), Colorado Mining Districts: A Reference, Colorado School of Mines Library, revised in 2015: 17.
Quick NavTopCommoditiesMineral ListRock TypesLocalities in RegionOther RegionsReferences
 
and/or  
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: September 4, 2026 06:26:37 Page updated: August 12, 2025 02:23:21
Go to top of page