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

Pumpellyite Subgroup from
Delaware Mine (Delaware Conglomerate Mine), Delaware, Grant Township, Keweenaw County, Michigan, USA


09737600017364255235985.jpg
Chlorastrolite

Delaware Mine, Delaware, Grant Township, Keweenaw County, Michigan, USA
07187420017866685033414.jpg
Chlorastrolite

Delaware Mine, Delaware, Grant Township, Keweenaw County, Michigan, USA
02540980017866685038394.jpg
Chlorastrolite

Delaware Mine, Delaware, Grant Township, Keweenaw County, Michigan, USA
Locality type:Mine
Classification
Species:'Pumpellyite Subgroup' (not an IMA approved species)
Formula:Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pumpellyite Subgroup data
Locality Data:Click here to view Delaware Mine (Delaware Conglomerate Mine), Delaware, Grant Township, Keweenaw County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:60685
Long-form Identifier:1:3:60685:9
GUID (UUID V4):0
Nearest other occurrences of Pumpellyite Subgroup
6.8km (4.2 miles) ⓘMedora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
7.2km (4.5 miles) ⓘNorthwestern Mine, Central, Houghton Township, Keweenaw County, Michigan, USA
7.4km (4.6 miles) ⓘMount Bohemia Mine, Mount Bohemia, Lac La Belle, Grant Township, Keweenaw County, Michigan, USA
7.7km (4.8 miles) ⓘCentral No. 2 shaft, Central Mine, Central, Houghton Township, Keweenaw County, Michigan, USA
7.7km (4.8 miles) ⓘCentral Mine, Central, Houghton Township, Keweenaw County, Michigan, USA
13.2km (8.2 miles) ⓘSt. Clair Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA
14.9km (9.2 miles) ⓘEagle River, Houghton Township, Keweenaw County, Michigan, USA
17.1km (10.6 miles) ⓘAvery shaft, Cliff Mine, Allouez Township, Keweenaw County, Michigan, USA
18.1km (11.2 miles) ⓘClark Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
22.5km (14.0 miles) ⓘIroquois Mine, Seneca, Allouez Township, Keweenaw County, Michigan, USA
References
Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111
 
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 07:06:29
Go to top of page