Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Prehnite from
Avery shaft, Cliff Mine, Allouez Township, Keweenaw County, Michigan, USA


Locality type:Shaft
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 Avery shaft, Cliff Mine, Allouez Township, Keweenaw County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:402011
Long-form Identifier:1:3:402011:0
GUID (UUID V4):0
Nearest other occurrences of Prehnite
0.1km (0.1 miles) ⓘCliff Mine, Allouez Township, Keweenaw County, Michigan, USA
0.4km (0.3 miles) ⓘSouth Cliff Mine, Allouez Township, Keweenaw County, Michigan, USA
0.9km (0.5 miles) ⓘNorth American Mine, Allouez Township, Keweenaw County, Michigan, USA
1.7km (1.1 miles) ⓘNorth Cliff Mine, Allouez Township, Keweenaw County, Michigan, USA
2.4km (1.5 miles) ⓘRobbins Mine (West Vein Mine), Phoenix, Houghton Township, Keweenaw County, Michigan, USA
2.8km (1.7 miles) ⓘManhattan Exploration Prospect, Ojibway, Allouez Township, Keweenaw County, Michigan, USA
3.2km (2.0 miles) ⓘPhoenix Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA
3.4km (2.1 miles) ⓘEagle River (Babbitt) Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA
3.7km (2.3 miles) ⓘEagle River, Eagle River, Houghton Township, Keweenaw County, Michigan, USA
3.8km (2.3 miles) ⓘLake Superior Mine (Old Phoenix Fissure), Phoenix, Houghton Township, Keweenaw County, Michigan, USA
References
Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Rosemeyer, Tom (2022) News from the Keweenaw: Part 5—Recent Mineral Finds in Michigan’s Copper Country. Rocks & Minerals, 97 (4) 354-363 doi:10.1080/00357529.2022.2053636
 
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: October 21, 2026 10:06:59
Go to top of page