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
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
╳Discussions
💬 Home🔎 Search📅 LatestGroups
EducationOpen discussion area.Fakes & FraudsOpen discussion area.Field CollectingOpen discussion area.FossilsOpen discussion area.Gems and GemologyOpen discussion area.GeneralOpen discussion area.How to ContributeOpen discussion area.Identity HelpOpen discussion area.Improving Mindat.orgOpen discussion area.LocalitiesOpen discussion area.Lost and Stolen SpecimensOpen discussion area.MarketplaceOpen discussion area.MeteoritesOpen discussion area.Mindat ProductsOpen discussion area.Mineral ExchangesOpen discussion area.Mineral PhotographyOpen discussion area.Mineral ShowsOpen discussion area.Mineralogical ClassificationOpen discussion area.Mineralogy CourseOpen discussion area.MineralsOpen discussion area.Minerals and MuseumsOpen discussion area.PhotosOpen discussion area.Techniques for CollectorsOpen discussion area.The Rock H. Currier Digital LibraryOpen discussion area.UV MineralsOpen discussion area.Recent Images in Discussions
Techniques for CollectorsMagnetite vs Hercynite
19th Jul 2012 21:52 UTCUtilisateur anonyme
How to differencier visually Magnétite and Hercynite ?
Thank
jean pierre
20th Jul 2012 17:41 UTCDonald Peck
Is the mineral octahedral or rounded grains (or massive). Hercynite is usually rounded grains or massive, not euhedral crystals (not to say it never is octahedral). It is usually green or greenish black, unlike black magnetite. But the best test is magnetic. Hercynite is not attracted to a magnet while magnetite is strongly attracted.
I am assuming you have small grains or crystals in a micro sized vug. If you insert a small cylindrical magnet in the end of plastic drinking straw, find its balance point and pass a needle through the midline of the straw at that point, you can balance it on a support made from cardstock (or any nonmagnetic material). It helps to cut a one centimetre length of drinking straw, slit it along its length and slide it onto the longer straw. You can move it as a counter poise to finely balance the assembly. Even a single micro crystal when brought up beneath the magnet will cause the straw to move.
20th Jul 2012 19:05 UTCUtilisateur anonyme
I go taking a cristal ,and make your shrewdness;
thank Donald
jean pierre,
20th Jul 2012 21:04 UTCGuenter Blass
Magnetite is metallic and shiny, shiny glaze is hercynite.
2) On the rocks or paragenesis, hercynite is most often associated with crystalline schists with corundum or cordierite.
The best method is an EDS analysis.
Günter Blaß
22nd Jul 2012 13:25 UTCUtilisateur anonyme
Thank
jean pierre
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: April 23, 2024 10:32:24
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: April 23, 2024 10:32:24