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Galena and Unknown? Help Please =)

Posted by Matt Wall  
avatar Galena and Unknown? Help Please =)
March 05, 2012 04:22PM
gb    
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
Attachments:
open | download - Mineral 2.jpg (865.6 KB)
open | download - Mineral 3.jpg (749.2 KB)
open | download - Mineral 5.jpg (947.9 KB)
Re: Galena and Unknown? Help Please =)
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 Re: Galena and Unknown? Help Please =)
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: [www.mindat.org]

Josele
avatar Re: Galena and Unknown? Help Please =)
March 06, 2012 07:31AM
gb    
Thanks for that guys, is there any test you can do to prove if it is calcite or fluorite.
Thanks, Matt smiling smiley
Re: Galena and Unknown? Help Please =)
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.
Re: Galena and Unknown? Help Please =)
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.
Re: Galena and Unknown? Help Please =)
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 Re: Galena and Unknown? Help Please =)
March 06, 2012 04:17PM
gb    
Thanks for all your help guys. I will try out those tests.
Thanks, Matt smiling smiley
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