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herrej
Joined: 15 Jul 2013
Posts: 52
Location: Rotterdam
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 Posted: Sep 26, 2013 09:39 Post subject: Hemimorphite from Ojuela mine or Santa Eulalia?? |
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Hello,
I bought this piece in september 1999
The label said Hemimorphite with Smithsonite?? on limonite matrix.
I think the black mineral is Plattnerite or some manganese oxides.
The smaller Hemimorphite xx are transparant.
Is it possible to pinpoint the location down to or the Ojuela mine or to a mine in the Santa Eulalia district?
Thanks for your help.
Regards
Harry Zondervan
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 973
Location: Tucson, Arizona
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| Posted: Sep 26, 2013 10:29 Post subject: Re: Hemimorphite from Ojuela mine or Santa Eulalia?? |
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Oxide zinc orebody
levels13 to 16
Mina el Potosi
Santa Eulalia
Black is chalcophanite
I do not see the supposed smithsonite but many specimens from this find have botryoidal willemite that was misidentified as smithsonite
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5020
Location: Barcelona
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| Posted: Sep 26, 2013 10:53 Post subject: Re: Hemimorphite from Ojuela mine or Santa Eulalia?? |
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| Peter Megaw wrote: | | ...I do not see the supposed smithsonite but many specimens from this find have botryoidal willemite that was misidentified as smithsonite |
Just add to the always proper Peter's comments that this botryoidal Willemite is very fluorescent instead the Smithsonite which is not (or just very, very, little fluorescent), so we can use the fluorescence to discriminate both species.
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herrej
Joined: 15 Jul 2013
Posts: 52
Location: Rotterdam
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| Posted: Sep 26, 2013 10:59 Post subject: Re: Hemimorphite from Ojuela mine or Santa Eulalia?? |
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Peter and Jordi,
Thanks for your reactions and the exact location.
Regards
Harry
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