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

Calcite from
Forest of Dean Mine, Fort Montgomery, Town of Highlands, Orange County, New York, USA


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Magnetite3
Diopside3
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Forest of Dean Mine, Fort Montgomery, Town of Highlands, Orange County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:79589
Long-form Identifier:1:3:79589:8
GUID (UUID V4):0
Nearest other occurrences of Calcite
3.3km (2.1 miles) ⓘBrooks Hollow Dam, Bear Mountain State Park, Orange County, New York, USA
4.9km (3.0 miles) ⓘBear Mountain, Bear Mountain State Park, Orange County, New York, USA
5.3km (3.3 miles) ⓘOre loading dock, Fort Montgomery, Town of Highlands, Orange County, New York, USA
6.2km (3.8 miles) ⓘAnthony's Nose, Cortlandt Township, Westchester County, New York, USA
6.8km (4.2 miles) ⓘIona Island, Bear Mountain State Park, Rockland County, New York, USA
7.9km (4.9 miles) ⓘPhilips Mine (Philips Pyrite Mine; Anthony's Nose Pyrrhotite Mine), Town of Philipstown, Putnam County, New York, USA
9.4km (5.8 miles) ⓘBradley Mine, Town of Tuxedo, Orange County, New York, USA
10.4km (6.5 miles) ⓘTodd Mine, Peekskill, Westchester County, New York, USA
11.1km (6.9 miles) ⓘMount Taurus Quarry, Town of Philipstown, Putnam County, New York, USA
11.3km (7.0 miles) ⓘPhilipstown, Cold Spring, Town of Philipstown, Putnam County, New York, USA
References
Clarke, John M. (1921, September) The Magnetite Iron Deposits of Southeastern New York. New York State Museum Bulletin Vol. 249-250. The University of the State of New YorkIndex Map, 103.
Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1). New York Mineralogical Clubp.72
 
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 10:04:54
Go to top of page