Donate now to keep alive!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 Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch 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 MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Removing metal brush deposits from tourmaline.

Posted by Jenna Mast  
Jenna Mast February 11, 2012 01:44AM
As I did not have an air compressor, I decided to use a steel brush attachment that came with my dremel to remove lepidolite coatings from tourmaline that I couldn't removing any other way. This works, however it also leave a thin metal deposit on the crystals. I only did a test section. I don't want to continue until I know how to remove the deposit. Does anyone have any suggestions?

Joseph Polityka February 11, 2012 02:36AM

Try using a wet Brillo Pad. I have used them with harder gem minerals to remove thin coatings.


Luca Baralis February 11, 2012 10:54AM
I don't use steel brush on hard rocks for this reason.
Some ideas:
toothpaste and brush (and time...)
polish paste/pad for metals objects
an home made electrolytic device

However I've never tried any of that.

Luca Baralis

Edited 1 time(s). Last edit at 02/11/2012 10:55AM by Luca Baralis.
William C. van Laer February 11, 2012 03:59PM

Complete removal is somewhat dependant on what type of metal brush you used: steel wire would require a soaking in warm/hot hydrochloric acid (muriatic acid), while a brass brush would require a soak in waek nitric acid. Both reactions would be facilitated by adding heat, but either will give off noxious fumes, so please use caution and do this under a fume hood.

William C. (CHRIS) van Laer: "I'm using the chicken to measure it..."
Jenna Mast February 12, 2012 06:42AM
Thanks for the suggestions everyone. I'll see if I can give some of them a try.

Sorry, only registered users may post in this forum.

Click here to login

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 1993-2018, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 16, 2018 11:44:40
Go to top of page