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

Goethite from
Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA


Locality type:Mine
Classification
Species:Goethite
Formula:Fe3+O(OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Goethite data
Locality Data:Click here to view Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:355192
Long-form Identifier:1:3:355192:9
GUID (UUID V4):0
Nearest other occurrences of Goethite
14.0km (8.7 miles) ⓘRoad Gulch, Fremont County, Colorado, USA
18.3km (11.4 miles) ⓘNiles Mine, Gem Park complex, Custer County, Colorado, USA
21.9km (13.6 miles) ⓘOrient Iron Mine (Caesar; MS 11400; Valley View; MS 8940; Vivia B.; MS 4988; Runaway; MS 1539; Prospector; MS 1505; Villa Grove), Orient Mining District, Saguache County, Colorado, USA
22.3km (13.8 miles) ⓘMcClure Gulch carbonatite, McClure Mountain Complex, Fremont County, Colorado, USA
23.3km (14.5 miles) ⓘPine Creek drainage (Pine Gulch), Gem Park complex, Fremont County, Colorado, USA
28.8km (17.9 miles) ⓘAmethyst carbonatite, McClure Mountain Complex, Fremont County, Colorado, USA
35.0km (21.7 miles) ⓘSilver Cliff Quarry, Silver Cliff Mining District, Custer County, Colorado, USA
35.1km (21.8 miles) ⓘRacine Boy Mine, Silver Cliff Mining District, Custer County, Colorado, USA
36.2km (22.5 miles) ⓘTuttle Ranch Occurrence (Willis Tuttle Ranch), McKinley Mountain Area, Fremont County, Colorado, USA
36.2km (22.5 miles) ⓘMeyers quarry (Meyers Quarry; Meyers-Halstead Quarry; Suzana Claims; Suzanna Claims; Royal Gorge No. 2), Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
References
Am Min 50:1179-1212
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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 14:36:30
Go to top of page