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 HelpPink Mineral on Pumice

14th Feb 2017 18:31 UTCRobert Darabos

05622570016029086735747.jpg
Pumice (or Tuff with Pumice on it) with pink!

Any ideas what causes the pink coloration?

Cobalt or Manganese? Or could it be something else with it being volcanic?

Also has some tiny, most likely Quartz crystlals, in matrix.


02217840015653022733530.jpg

09579520015653022738104.jpg

14th Feb 2017 18:32 UTCRobert Darabos

it is much more pink than the photo shows. think my photo lights flooded the color out a little.

14th Feb 2017 18:49 UTCScott Rider

It could be montbrassite, calcite, who knows..........?


However, we can't really help you unless you can tell us a few things, most important being where is it from? Do you know how to test for hardness? If its calcite, it would fizz if you put some vinegar on it, (edit: just don't put it on the main face of the specimen, try to see if you can break a little piece off to test)...


Just having images does us no good, unless its something really obvious like a good, well formed Quartz crystal... Many minerals can have similar optical and morphological properties and that is why we need further info to give you an informative answer...

14th Feb 2017 20:04 UTCReiner Mielke Expert

Light hematite staining most likely.

14th Feb 2017 23:55 UTCGregg Little 🌟

Pumice is a volcaniclastic deposit so the colouring could derive from the parent material to alteration during deposition and/or lithification.

15th Feb 2017 05:12 UTCVolkmar Stingl

Reiner is right!
 
Mineral and/or Locality  
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: March 29, 2024 01:15:56
Go to top of page