Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of 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

Anthophyllite from
Castle Rock, Edgemont Township, Delaware County, Pennsylvania, USA


Locality type:Village
Classification
Species:Anthophyllite
Formula:◻Mg2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Anthophyllite data
Locality Data:Click here to view Castle Rock, Edgemont Township, Delaware County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:360478
Long-form Identifier:1:3:360478:6
GUID (UUID V4):0
Nearest other occurrences of Anthophyllite
3.4km (2.1 miles) ⓘBlue Hill, Media, Upper Providence Township, Delaware County, Pennsylvania, USA
12.9km (8.0 miles) ⓘCambridge Downs, Concord Township, Delaware County, Pennsylvania, USA
17.3km (10.8 miles) ⓘGladwyne Quarries, Gladwyne, Lower Merion Township, Montgomery County, Pennsylvania, USA
21.2km (13.2 miles) ⓘWissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
25.3km (15.7 miles) ⓘMount Cuba serpentinite, New Castle County, Delaware, USA
33.2km (20.6 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
52.1km (32.4 miles) ⓘWhite Barrens, Elk Township, Chester County, Pennsylvania, USA
58.1km (36.1 miles) ⓘDunlap's Quarry, West Nottingham Township, Chester County, Pennsylvania, USA
79.1km (49.2 miles) ⓘHarford Talc and Quartz Company Quarry (Maryland Ceramic & Steatite Company Inc), Dublin, Jarretsville-Dublin Mining District, Harford County, Maryland, USA
84.9km (52.8 miles) ⓘSherrer Quarry, C.K. Williams Quarry complex, Chestnut Hill, Easton, Northampton County, Pennsylvania, USA
References
Samuel S. Gordon, pg. 188
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp.
 
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 3, 2026 11:52:52
Go to top of page