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

Microcline from
Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Microcline
Formula:K(AlSi3O8)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:132766
Long-form Identifier:1:3:132766:3
GUID (UUID V4):0
Nearest other occurrences of Microcline
58.2km (36.1 miles) ⓘCoatesville pegmatite locality, Coatesville, Chester County, Pennsylvania, USA
58.7km (36.5 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
68.6km (42.6 miles) ⓘChester County Poorhouse Quarry, West Bradford Township, Chester County, Pennsylvania, USA
71.5km (44.4 miles) ⓘHenry Pusey's quarry, Willowdale, East Marlboro Township, Chester County, Pennsylvania, USA
82.8km (51.5 miles) ⓘWest Branch pegmatite, Newark, New Castle County, Delaware, USA
85.6km (53.2 miles) ⓘWoodlawn Quarry, Wilmington, New Castle County, Delaware, USA
90.6km (56.3 miles) ⓘSycamore Mill (Bishop's Mill), Sycamore Mills, Upper Providence Township, Delaware County, Pennsylvania, USA
90.6km (56.3 miles) ⓘSycamore Mills, Upper Providence Township, Delaware County, Pennsylvania, USA
91.0km (56.5 miles) ⓘBlue Hill, Media, Upper Providence Township, Delaware County, Pennsylvania, USA
91.0km (56.5 miles) ⓘLenni, Middletown Township, Delaware County, Pennsylvania, USA
References
Lapham, Davis M., Geyer, Alan R. (1965) Mineral Collecting in Pennsylvania. Bulletin G33 (2nd ed.). Pennsylvania Geological Survey
 
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 03:26:25
Go to top of page