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 Time
Minerals by PropertiesMinerals by ChemistryAdvanced 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 Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Identity HelpHematite septaria locality question

16th May 2019 09:08 UTCMateusz Piotrowicz

01615470016027235267322.jpg
Good morning,

I've bought a hematite septaria. Dealer told me it's from UK, but I'm curious to find out where it exactly came from. Do you have any ideas?

00605200015652776058548.jpg

18th May 2019 05:31 UTCGregg Little 🌟

No idea of location but, unless I am mistaken, applying the term "septarian" to a botryoidal or mammillary or globular hematite habit is a bit misleading. Septarian refers to a geological process involving desiccation, often in nodules, forming the unusual cavity patterns.

18th May 2019 05:45 UTCPaul Brandes 🌟 Manager

Welcome to Mindat, Mateusz!


These are not "septaria", but rather appear like iron concretions.

Have you broke one of these open to examine the interior?

18th May 2019 21:33 UTCMateusz Piotrowicz

No, I didn’t broken it, because I have only one of these.

Sorry for the mistake in translation, it should be conrection.

18th May 2019 22:31 UTCŁukasz Kruszewski Expert

Are you sure this is hematite? You might want to check the streak colour.

19th May 2019 19:13 UTCMateusz Piotrowicz

Just checked the streak, it’s red, so I assume this specimen is hematite.

19th May 2019 21:15 UTCŁukasz Kruszewski Expert

Interesting, it is quite large then. I was previously thinking about awaruite, but its concretions are more flat and rusty-dark-brown.

19th May 2019 21:29 UTCKrzysztof Andrzejewski

- check kidney ore from West Cumberland Iron Field, only your specimen is not of the good quality

19th May 2019 22:14 UTCColin Robinson

NOT kidney ore from west Cumbria.

19th May 2019 23:17 UTCKrzysztof Andrzejewski

Why not? If found in the river?

20th May 2019 13:07 UTCColin Robinson

I lived in west Cumbria for 12 years and have collected extensively there for about 35 years. I know kidney ore in all its many disguises and even water-worn kidney ore does not look like the specimen pictured. While it may well have hematite in it I'd be 99.9 percent certain it's not from west Cumbria. I will also suggest that if it is so heavily worn as to be no longer botryoidal/mammillary you can't really call it kidney ore.

22nd May 2019 20:23 UTCMateusz Piotrowicz

Thanks for your responds. I’ll leave it labeled as UK. This looks like another unsolved mystery.
 
and/or  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, 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.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 3, 2024 23:06:25
Go to top of page