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

Prehnite from
Franklin Jr. Mine (Albany & Boston; Peninsula), Boston, Franklin Township, Houghton County, Michigan, USA


Locality type:Mine
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Franklin Jr. Mine (Albany & Boston; Peninsula), Boston, Franklin Township, Houghton County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:306152
Long-form Identifier:1:3:306152:7
GUID (UUID V4):0
Nearest other occurrences of Prehnite
0.7km (0.4 miles) ⓘRhode Island Mine, Boston, Franklin Township, Houghton County, Michigan, USA
3.5km (2.2 miles) ⓘArcadian Mine, Ripley, Franklin Township, Houghton County, Michigan, USA
4.3km (2.7 miles) ⓘMesnard Mine (Quincy No. 8 shaft), Franklin Township, Houghton County, Michigan, USA
5.2km (3.2 miles) ⓘFranklin Mine, Franklin Mine, Franklin Township, Houghton County, Michigan, USA
5.6km (3.5 miles) ⓘPewabic Mine, Pewabic, Franklin Township, Houghton County, Michigan, USA
6.2km (3.8 miles) ⓘQuincy Mine, Quincy Township, Houghton County, Michigan, USA
6.5km (4.1 miles) ⓘNo. 4 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
7.1km (4.4 miles) ⓘOsceola Amygdaloid, Osceola Township, Houghton County, Michigan, USA
7.2km (4.4 miles) ⓘSouth Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA
7.4km (4.6 miles) ⓘOsceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
References
Rosemeyer, Tom (2005) The Occurrence of Porcelaneous Datolite in Michigan's Lake Superior Copper District. Rocks & Minerals, 80 (3) 154-177 doi:10.3200/rmin.80.3.154-177
 
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 11:09:34
Go to top of page