Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for your votes!
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
Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA


Locality type:Mine
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Native Copper6
Native Silver5
Epidote1
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:54958
Long-form Identifier:1:3:54958:1
GUID (UUID V4):0
Localities for Prehnite in this Region
No. 1 shaft, Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA
Nearest other occurrences of Prehnite
0.3km (0.2 miles) ⓘNo. 1 shaft, Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA
1.4km (0.9 miles) ⓘTamarack Mine, Tamarack, Osceola Township, Houghton County, Michigan, USA
1.4km (0.9 miles) ⓘTamarack, Osceola Township, Houghton County, Michigan, USA
1.5km (0.9 miles) ⓘOsceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
1.7km (1.0 miles) ⓘSouth Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA
1.9km (1.2 miles) ⓘOsceola Amygdaloid, Osceola Township, Houghton County, Michigan, USA
2.0km (1.2 miles) ⓘTamarack Junior Mine (Tamarack Jr. Mine), Centennial Heights, Calumet Township, Houghton County, Michigan, USA
2.3km (1.4 miles) ⓘNo. 4 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
2.7km (1.7 miles) ⓘNo. 2 shaft, Centennial Mine, Centennial Heights, Calumet Township, Houghton County, Michigan, USA
3.3km (2.1 miles) ⓘSouth Kearsarge Mine, Kearsarge, Calumet Township, Houghton County, Michigan, USA
References
Rocks & Min.:58:109 & 64:150.
 
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 5, 2026 02:58:09
Go to top of page