Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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

Copper King Mine (Yeager's Mine), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USAi
Regional Level Types
Copper King Mine (Yeager's Mine)Mine
Gold HillHill
Gold Hill Mining DistrictMining District
Boulder CountyCounty
ColoradoState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
40° 3' 19'' North , 105° 25' 10'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Gold Hill230 (2011)1.2km
Sugarloaf261 (2011)4.4km
Sunshine230 (2011)4.6km
Mountain Meadows274 (2011)4.8km
Crisman186 (2011)5.2km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Flatirons Mineral ClubBoulder, Colorado13km
Mile High Rock and Mineral SocietyArvada, Colorado40km
Colorado Mineral SocietyLakewood, Colorado48km
Mindat Locality ID:
3591
Long-form identifier:
mindat:1:2:3591:3
GUID (UUID V4):
0


A copper-nickel mine in the Idaho Springs Formation (lenticular layers of amphibolite in a biotite schist). Owned by Mr. Yeager. Workings featured 2 adits (upper & lower tunnels) with a connecting winze, an open cut & a shaft. Located near Gold Hill. Produced 25,000 tons of Ni ore at 2 - 3% Ni.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


17 valid minerals.

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Chalcopyrite
Formula: CuFeS2
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cobaltite
Formula: CoAsS
'Garnierite'
Hematite
Formula: Fe2O3
'Limonite'
Malachite
Formula: Cu2(CO3)(OH)2
Millerite
Formula: NiS
Morenosite
Formula: NiSO4 · 7H2O
Native Mercury
Formula: Hg
Nickeline
Formula: NiAs
Pentlandite
Formula: (NixFey)Σ9S8
Polydymite
Formula: Ni2+Ni3+2S4
Pyrite
Formula: FeS2
Pyrite var. Bravoite
Formula: (Fe,Ni)S2
Pyrrhotite
Formula: Fe1-xS
Quartz
Formula: SiO2
Sphalerite
Formula: ZnS
Violarite
Formula: Fe2+Ni3+2S4

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Native Mercury1.AD.05Hg
Group 2 - Sulphides and Sulfosalts
Pentlandite2.BB.15(NixFey)Σ9S8
Sphalerite2.CB.05aZnS
Chalcopyrite2.CB.10aCuFeS2
Nickeline2.CC.05NiAs
Pyrrhotite2.CC.10Fe1-xS
Millerite2.CC.20NiS
Polydymite2.DA.05Ni2+Ni3+2S4
Violarite2.DA.05Fe2+Ni3+2S4
Pyrite
var. Bravoite
2.EB.05a(Fe,Ni)S2
2.EB.05aFeS2
Arsenopyrite2.EB.20FeAsS
Cobaltite2.EB.25CoAsS
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Morenosite7.CB.40NiSO4 · 7H2O
Group 9 - Silicates
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
'Limonite'-
'Garnierite'-

List of minerals for each chemical element

HHydrogen
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
H MalachiteCu2(CO3)(OH)2
H MorenositeNiSO4 · 7H2O
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
O HematiteFe2O3
O MalachiteCu2(CO3)(OH)2
O MorenositeNiSO4 · 7H2O
O QuartzSiO2
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Si QuartzSiO2
SSulfur
S ArsenopyriteFeAsS
S Pyrite var. Bravoite(Fe,Ni)S2
S ChalcopyriteCuFeS2
S CobaltiteCoAsS
S MilleriteNiS
S MorenositeNiSO4 · 7H2O
S Pentlandite(NixFey)Σ9S8
S PolydymiteNi2+Ni23+S4
S PyriteFeS2
S PyrrhotiteFe1-xS
S SphaleriteZnS
S ViolariteFe2+Ni23+S4
FeIron
Fe ArsenopyriteFeAsS
Fe Pyrite var. Bravoite(Fe,Ni)S2
Fe ChalcopyriteCuFeS2
Fe HematiteFe2O3
Fe Pentlandite(NixFey)Σ9S8
Fe PyriteFeS2
Fe PyrrhotiteFe1-xS
Fe ViolariteFe2+Ni23+S4
CoCobalt
Co CobaltiteCoAsS
NiNickel
Ni Pyrite var. Bravoite(Fe,Ni)S2
Ni MilleriteNiS
Ni MorenositeNiSO4 · 7H2O
Ni NickelineNiAs
Ni Pentlandite(NixFey)Σ9S8
Ni PolydymiteNi2+Ni23+S4
Ni ViolariteFe2+Ni23+S4
CuCopper
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
As CobaltiteCoAsS
As NickelineNiAs
HgMercury
Hg Native MercuryHg

Other Regions, Features and Areas containing this locality


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

 
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 3, 2026 10:17:54 Page updated: August 8, 2025 21:44:21
Go to top of page