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
Minerals 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

Cryptomelane from
Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal


00617350017362067634913.jpg
Cryptomelane, etc.

Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
05188500017272041179192.jpg
Cryptomelane, etc.

Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
09768280017272060994598.jpg
Cryptomelane, etc.

Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
05188500017272041179192.jpg
Cryptomelane, etc.

Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
09768280017272060994598.jpg
Cryptomelane, etc.

Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
05188500017272041179192.jpg
Cryptomelane, etc.

Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
Locality type:Mine
Classification
Species:Cryptomelane
Formula:K(Mn74+Mn3+)O16
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Strengite2
Rittmannite1
Phosphosiderite1
Cyrilovite1
Hentschelite1
Frondelite1
Data
Mineral Data:Click here to view Cryptomelane data
Locality Data:Click here to view Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:738475
Long-form Identifier:1:3:738475:2
GUID (UUID V4):0
Nearest other occurrences of Cryptomelane
0.0km (0.0 miles) ⓘBendada Mines, Bendada, Sabugal, Guarda, Portugal
26.2km (16.3 miles) ⓘSítio do Castelo Mine, Folgosinho, Gouveia, Guarda, Portugal
69.1km (43.0 miles) ⓘLa Paloma Mine, Zarza la Mayor, Cáceres, Extremadura, Spain
References
Alves, Pedro (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: October 14, 2026 06:21:18
Go to top of page