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

Cummingtonite from
Homestake Mine, Lead, Lead Mining District, Lawrence County, South Dakota, USA


Locality type:Mine
Classification
Species:Cummingtonite
Formula:◻Mg2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Chlorite Group2
Data
Mineral Data:Click here to view Cummingtonite data
Locality Data:Click here to view Homestake Mine, Lead, Lead Mining District, Lawrence County, South Dakota, USA
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:68610
Long-form Identifier:1:3:68610:1
GUID (UUID V4):0
Nearest other occurrences of Cummingtonite
21.9km (13.6 miles) Montana Mine, Rochford Mining District, Lawrence County, South Dakota, USA
25.0km (15.5 miles) Montezuma Mine (Montezuma Nos. 3 to 7; Red Jim; New Montezuma), Rochford Mining District, Pennington County, South Dakota, USA
25.7km (16.0 miles) Gold King Mine (Gordelia Mine), Rochford Mining District, Pennington County, South Dakota, USA
26.1km (16.2 miles) Mary Belle Mine, Rochford Mining District, Pennington County, South Dakota, USA
26.6km (16.5 miles) Standby mine, Rochford Mining District, Pennington County, South Dakota, USA
28.7km (17.9 miles) King of the West (North Star), Rochford Mining District, Pennington County, South Dakota, USA
30.5km (19.0 miles) Golden West Mine (Benedict Property), Rochford Mining District, Pennington County, South Dakota, USA
31.4km (19.5 miles) Black Eagle Mine (Blair Group), Rochford Mining District, Pennington County, South Dakota, USA
69.0km (42.9 miles) Newark Group, Unorganized mining district [1], Custer County, South Dakota, 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 4, 2026 09:02:22
Go to top of page