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

Monazite-(Ce) from
Cotopaxi Feldspar Mine (Cotopaxi Feldspar prospect; Henry pegmatite), Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA


Locality type:Mine
Classification
Species:Monazite-(Ce)
Formula:Ce(PO4)
Comments:Reidentified as crytolite
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Monazite-(Ce) data
Locality Data:Click here to view Cotopaxi Feldspar Mine (Cotopaxi Feldspar prospect; Henry pegmatite), Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:34989
Long-form Identifier:1:3:34989:3
GUID (UUID V4):0
Nearest other occurrences of Monazite-(Ce)
14.2km (8.8 miles) ⓘRoad Gulch, Fremont County, Colorado, USA
20.4km (12.7 miles) ⓘVermiculite Mine (MRDS - 10013422), Gem Park complex, Fremont County, Colorado, USA
30.4km (18.9 miles) ⓘEight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
35.9km (22.3 miles) ⓘBaumer Pegmatite Prospect, Guffey Mining District, Park County, Colorado, USA
36.4km (22.6 miles) ⓘRam Lode and Pam Lode (Ramdohrite lode), Blake Mining District (Mirage Mining District; Cotton Creek Mining District), Saguache County, Colorado, USA
42.8km (26.6 miles) ⓘBob Cat Mine, Crestone Mining District (Baca Grant Mining District), Saguache County, Colorado, USA
55.2km (34.3 miles) ⓘCrystal No. 8 Mine, Chaffee County, Colorado, USA
69.8km (43.4 miles) ⓘKatydid Mine (Rogers Publishing Company Mine), Wilkerson Pass Area, Park County, Colorado, USA
70.2km (43.6 miles) ⓘBlack Cloud Mine, Teller County, Colorado, USA
75.6km (47.0 miles) ⓘSt Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.pp.14-15
 
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 07:41:58
Go to top of page