[meteorite-list] scanner and hexahedrite vs cameraandhexaedrite

From: mark ford <markf_at_meteoritecentral.com>
Date: Tue Sep 12 05:11:03 2006
Message-ID: <6CE3EEEFE92F4B4085B0E086B2941B3159FA7E_at_s-southern01.s-southern.com>

I have to agree with Martin, Neumann lines will show if they are there.

 There is no 'magic potion' needed (though some chemicals are better than others), not all pieces will show lines, depends on the stresses on the particular piece in question.

 Use a good etchant like Ferric Chloride, good surface preparation (no saw marks!) is vital.... ;)

Mark



-----Original Message-----
From: meteorite-list-bounces_at_meteoritecentral.com [mailto:meteorite-list-bounces@meteoritecentral.com] On Behalf Of Martin Altmann
Sent: 11 September 2006 17:52
To: 'Alexander Seidel'; meteorite-list_at_meteoritecentral.com
Subject: AW: RE: [meteorite-list] scanner and hexahedrite vs cameraandhexaedrite

Not to forget to mention, that not in each and every specimen of a find or
fall, the Neumann lines are likewise developed.

Sometimes they will appear extremely sharp, sometimes faint, some pieces
won't have any - and that is independent from the preparation mode.

Martin

-----Urspr?ngliche Nachricht-----
Von: meteorite-list-bounces_at_meteoritecentral.com
[mailto:meteorite-list-bounces_at_meteoritecentral.com] Im Auftrag von
Alexander Seidel
Gesendet: Montag, 11. September 2006 18:29
An: Sergey Vasiliev; Meteorite-list_at_meteoritecentral.com
Betreff: Re: RE: [meteorite-list] scanner and hexahedrite vs camera
andhexaedrite

What a striking point, Sergey! My Guadalupe y Calvo just looks the same in a
plain simple photograph. :-) We learn it?s all a matter or light and
photographic skills and everything else to get "the real thing" transported
to another viewer, and even when showing such a specimen to another person
right on a spot, you have "to turn it here-there, left-right", just the way
you well described it!

Thanks for this alternative picture, very good indeed in comparison!

Alex
Berlin/Germany


> Alex,
>
> You are right saying that you have to have the slice in front of you.
> The basic picture I just did with my camera is:
> http://sv-meteorites.iol.cz/boguslavka_1.jpg
> But... I posted the scanned image because it shows much more details than
> you can see while looking at the slice itself. To see the details you have
> to turn it here-there, left-right. You know what I mean. But the scanner
> showed me a view I couldn't get with the slice in my hands.
> That was the point.
>
> Best regards,
> Sergey
>
>
>
> -----Original Message-----
> From: Alexander Seidel [mailto:gsac_at_gmx.net]
> Sent: Monday, September 11, 2006 5:55 PM
> To: Andreas Gren; petrovich_at_sv-meteorites.com
> Cc: meteorite-list_at_meteoritecentral.com
> Subject: AW: [meteorite-list] scanner and hexahedrite vs camera and
> hexaedrite
>
>
> Thanks a bunch Andi for showing these pics, and I?m very much looking
> forward to receiving your prepared slice, which will be my very own share
> of
> Boguslavka, soon.
>
> Hexahedrites are no easy task for a photographer or a scanner, not even if
> you discuss a specimen right in front of you, "in person" so to say. I had
> the great pleasure of meeting Andi a couple of weeks ago in Hamburg and
> handed him my 34.8 g slice of Guadalupe y Calvo for inspection. I must
> admit
> he was more skilled than me to point me to those tiny lines in between an
> otherwise rather bare polished suface which were not due to scratches or
> something evil like that, but were in fact: Neumann lines! Quite hidden in
> this case, but present nonetheless! Sometimes you have to look really
> closely, and sometimes a photograph or scanner pic won?t do the specimen
> in
> front of you justice.
>
> P.S.: sorry Sergey, I had simply overlooked your scale figures at the
> bottom
> and left side of your beautiful pic! Nonetheless, some "material scale", a
> scale cube or a scale stripe or even a pencil or knife or something like
> this will usually work better with ones "imagination" than just a
> figure...
> :-)
>
> Best,
> Alex
> Berlin/Germany
>
>
> -------- Original-Nachricht --------
> Datum: Mon, 11 Sep 2006 17:21:52 +0200
> Von: "Andreas Gren" <info_at_meteoritenhaus.de>
> An: "\'Sergey Vasiliev\'" <petrovich_at_sv-meteorites.com>
> Betreff: AW: [meteorite-list] scanner and hexahedrite vs camera and
> hexaedrite
>
> > But a camera is also able to do a nice job, even with one light source.
> > The Neumannlines appears much finer, especially in small slices.
> > Best Regards
> > Andi
> >
> > www.meteoritenhaus.de/img/Boguslavka10.jpg
> >
> > www.meteoritenhaus.de/img/Boguslavka7_03g.jpg
> >
> >
> > -----Urspr?ngliche Nachricht-----
> > Von: meteorite-list-bounces_at_meteoritecentral.com
> > [mailto:meteorite-list-bounces_at_meteoritecentral.com] Im Auftrag von
> Sergey
> Vasiliev
> > Gesendet: Montag, 11. September 2006 14:34
> > An: Meteorite-list_at_meteoritecentral.com
> > Betreff: [meteorite-list] scanner and hexahedrite
> >
> > Hello List,
> > I just want to share the image I got from my scanner and full slice of
> > Boguslavka hexahedrite.
> > http://sv-meteorites.iol.cz/boguslavka.jpg
> > Usually I'm taking a pictures with my camera but sometimes scanner does
> a
> > better job.
> > Don't you think so? ;-)
> > Sergey
> >
> > -----------------------------------------
> > Sergey Vasiliev
> > U Dalnice 839,
> > Prague 5, 15500
> > Czech Republic
> > ------------------------------------------
> > http://www.sv-meteorites.com
> > http://impactites.net
> > http://systematic-mineralogy.com
> >
> > ______________________________________________
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> >
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Received on Tue 12 Sep 2006 05:11:35 AM PDT