Vote for your favorite mineral in #MinCup26! - Cuprite vs. Halite
While externally similar shapes, these two minerals are very different inside.
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

Montmorillonite from
California Fullers Earth deposit, Halfway House, Kern County, California, USA


Locality type:Deposit
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view California Fullers Earth deposit, Halfway House, Kern County, California, USA
Data Identifiers
Mindat Occurrence Record ID:973701
Long-form Identifier:1:3:973701:3
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
72.7km (45.2 miles) ⓘMaricopa pit [1] (Elkhorn pit & mill), Maricopa, Kern County, California, USA
72.7km (45.2 miles) ⓘExcel pit (Excell pit and mill), Spellacy, Temblor Range, Kern County, California, USA
73.7km (45.8 miles) ⓘMcKittrick pit (McKittrick Mud Company; Midway), Reward, Temblor Range, Kern County, California, USA
74.0km (46.0 miles) ⓘFiltrol Bentonite deposit (Filtrol Company Clay deposit #1; Filtrol Company L Clay deposit; Filtrol Fuller's Earth deposit), Sugarloaf Mountain, Loraine Mining District, Kern County, California, USA
91.8km (57.1 miles) ⓘIron Canyon Mine (Brown and White; Brown-Whiten; Sesomotite Mine; Seisomite; Iron Canyon Brown and White), Ricardo, El Paso Mountains District, Kern County, California, USA
95.7km (59.4 miles) ⓘMcKendry Bentonite deposit, Gypsite, Fremont Valley, Kern County, California, USA
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 29, 2026 06:00:15
Go to top of page