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

Ankerite from
Heath Quarry, Casco, Cumberland County, Maine, USA


02956700017339888671230.jpg
Ankerite, etc.

Heath Quarry, Casco, Cumberland County, Maine, USA
08268890017610323621148.jpg
Ankerite

Heath Quarry, Casco, Cumberland County, Maine, USA
09383910017369393321024.jpg
Ankerite

Heath Quarry, Casco, Cumberland County, Maine, USA
02956700017339888671230.jpg
Ankerite, etc.

Heath Quarry, Casco, Cumberland County, Maine, USA
05642510017609620418802.jpg
Ankerite

Heath Quarry, Casco, Cumberland County, Maine, USA
09383910017369393321024.jpg
Ankerite

Heath Quarry, Casco, Cumberland County, Maine, USA
02956700017339888671230.jpg
Ankerite, etc.

Heath Quarry, Casco, Cumberland County, Maine, USA
08268890017610323621148.jpg
Ankerite

Heath Quarry, Casco, Cumberland County, Maine, USA
09383910017369393321024.jpg
Ankerite

Heath Quarry, Casco, Cumberland County, Maine, USA
Locality type:Quarry
Classification
Species:Ankerite
Formula:Ca(Fe2+,Mg)(CO3)2
Comments:The yellow/tan carbonate with a curved rhombohedral habit that occurs in cavities in feldspar at this locality, and is associated with pyrite and rutile in many of the posted photos, was initially visually identified as dolomite, but SEM-EDS analysis (Fe>>Mg>Mn) shows that it is ankerite. Light pink curved crystals (as seen in photo 73389) may be dolomite, but have not yet been analyzed. (P. Cristofono)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Calcite5
Quartz4
Pyrite1
Albite1
Data
Mineral Data:Click here to view Ankerite data
Locality Data:Click here to view Heath Quarry, Casco, Cumberland County, Maine, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:598376
Long-form Identifier:1:3:598376:6
GUID (UUID V4):0
Nearest other occurrences of Ankerite
97.1km (60.4 miles) ⓘWoodstock Silver Mine, Woodstock, Grafton County, New Hampshire, USA
References
Cristofono, Peter (n.d.) Personal communication.
 
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 11:09:49
Go to top of page