Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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

Serpentine Subgroup from
Stillwater Mine (Johns-Manville Stillwater Platinum; Stillwater PGM Resources; Stillwater Platinum Project; M Prospect), Sweet Grass County, Montana, USA


Locality type:Mine
Classification
Species:'Serpentine Subgroup' (not an IMA approved species)
Formula:D3[Si2O5](OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Serpentine Subgroup data
Locality Data:Click here to view Stillwater Mine (Johns-Manville Stillwater Platinum; Stillwater PGM Resources; Stillwater Platinum Project; M Prospect), Sweet Grass County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:1833224
Long-form Identifier:1:3:1833224:1
GUID (UUID V4):0
Nearest other occurrences of Serpentine Subgroup
3.2km (2.0 miles) ⓘPicket Pins prospect (Picket Pin occurrence), Sweet Grass County, Montana, USA
3.9km (2.4 miles) ⓘFrog Pond West Occurrence (J-M Reef), Sweet Grass County, Montana, USA
5.4km (3.4 miles) ⓘEast Boulder Mine, Sweet Grass County, Montana, USA
5.6km (3.5 miles) ⓘMonkey East Camp Zone Occurrence (J-M Reef), Sweet Grass County, Montana, USA
6.5km (4.0 miles) ⓘIron Mountain-Chrome Group W (Chrome Group), Sweet Grass County, Montana, USA
11.6km (7.2 miles) ⓘWest Fork East Adit Occurrence (J-M Reef), Sweet Grass County, Montana, USA
18.5km (11.5 miles) ⓘStillwater Mine, Stillwater County, Montana, USA
23.1km (14.4 miles) ⓘNye Basin Big Seven Occurrence, Stillwater County, Montana, USA
24.4km (15.2 miles) ⓘBenbow Mine, Stillwater County, Montana, USA
66.9km (41.5 miles) ⓘFour Chromes prospect (Four Chromes claims), Red Lodge, Carbon County, Montana, USA
References
Chen, Chen; Xian, Haiyang; Jenkins, Christopher; Yao, Zhuosen; Yang, Yiping; Lin, Xiaoju; Li, Shan; Xi, Jiaxin; Yuan, Yuhuan; Zhu, Jianxi; et al. (2025) Wangyanite, PdNi8S8, a new Pd end-member mineral of the pentlandite group from the J-M reef, Stillwater Complex, Montana, USA. American Mineralogist, 110 (11). 1844-1853 doi:10.2138/am-2024-9640
 
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 6, 2026 11:47:18
Go to top of page