LIVE REPORT! Munich 2016 - Live Report - last updated 1 minute ago. Click here to watch.
Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery


Posted by Hervé Osana  
May 23, 2012 01:09AM
I would like you'r suggesting about this sample
I 'd found this one under icemount "Les Bossons" near at Chamonix town
It mean carbon but there is a crystal included. we can observ in clos-up a mix of colored micro-crystals
Perhaps whith picture quality, it's visual effect. I can't do perfectly more
Thank you
open | download - sun effect.JPG (93.3 KB)
open | download - sun effect 3.JPG (123.3 KB)
open | download - bismuth.JPG (105.5 KB)
avatar Re: Anthracite?
May 23, 2012 10:12PM
I have not a clue.

Rock Currier
Crystals not pistols.
Re: Anthracite?
May 24, 2012 06:01AM
Crystal looks like a weathered sulfide with tarnish...Tarnish makes the effect of many colorful dots - it doesn't look like there're mix of microcrystals. Due to the base colour - pyrite maybe?
avatar Re: Anthracite?
May 24, 2012 04:01PM
Re: Anthracite?
May 24, 2012 05:23PM
Pyrite is very common in coal layers. It may cause self-ignition of the coal when it oxidizes and gives heat, and a lot of secondary sulfates are found in coalmines.

Your Email:


  • Valid attachments: jpg, jpeg, gif, png, pdf
  • No file can be larger than 4.88 MB
  • 3 more file(s) can be attached to this message

Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2016, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 28, 2016 09:22:59
Go to top of page