Help mindat.org|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:
Keyword(s):
 
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
bannerbannerbannerbannerbannerbanner

Galena and Unknown? Help Please =)

Posted by Matt Wall  
avatar
Matt Wall March 05, 2012 04:22PM
Hi there everyone,
I found this mineral near the Odin Mine again, Castleton, Derbyshire, UK, last weekend. I am just wondering what the pink mineral is in the first 2 photos, it weighs in at 160g, and contains a Galena/Sphalerite. Also, does anyone know what the shining/glistening mineral is the third photo. This sample is very heavy, about 370g and also contains a Galena/Sphalerite mix.
All ideas/messages appreciated,
Thanks, Matt. smiling smiley
open | download - Mineral 2.jpg (865.6 KB)
open | download - Mineral 3.jpg (749.2 KB)
open | download - Mineral 5.jpg (947.9 KB)
avatar
Erik Vercammen March 05, 2012 04:57PM
1 and 2 may show barite ( or baryte?), as you say it is heavy. In that case, it should not fizz when put in acid.
3 may be quartz: in that case, it is harder than a knife and scratches glass.
avatar
José Zendrera March 05, 2012 10:15PM
I agree with Erik, photo 1 and 2 looks baryte.
Relating photo 3, I also would consider the possibility that there is more than one spice, as calcite / fluorite. Please see: http://www.mindat.org/photo-198538.html

Jose
avatar
Matt Wall March 06, 2012 07:31AM
Thanks for that guys, is there any test you can do to prove if it is calcite or fluorite.
Thanks, Matt smiling smiley
avatar
Noah Horwitz March 06, 2012 02:26PM
Quartz will scratch glass, calcite and fluorite won't.

Calcite will fizz when put into reasonably concentrated acids (eg. hydrochloric acid from hardware store) and will bubble slowly even in vinegar. Fluorite shouldn't react with either acid. Obviously, try the acid test with a small chip so you don't ruin your specimen.
avatar
Spencer Ivan Mather March 06, 2012 04:04PM
The shiny mineral on the reverse side is Fluorite in tiny crystals, and the pink is most likely Barite, but pink calcite can also be found at the Odin mine, so you will need to test it, (calcite fizzes if a drop of diluted HCL is put onto it, and barite gives a good green coloured flame test.
avatar
Georg Graf March 06, 2012 04:07PM
Hi Matt,

photo 1 and 2: Baryte (quite heavy, scratched by a knife) or Calcite (gas bubbles with vine gear).
The 3. photo Quartz (harder than steel), Fluorite (crystalls are cubes, magnifying lens) or Calcite.

Greetings, Georg
avatar
Matt Wall March 06, 2012 04:17PM
Thanks for all your help guys. I will try out those tests.
Thanks, Matt smiling smiley
Your Email:


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.
CAPTCHA
Your message:
Attachments:
  • Valid attachments: jpg, jpeg, gif, png, pdf
  • No file can be larger than 9.38 MB
  • 3 more file(s) can be attached to this message



bannerbannerbannerbannerbannerbanner
Mineral and/or Locality  
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 1993-2016, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 4, 2016 02:02:28
Go to top of page