[Rockhounds] fossils

[Axel Emmermann]

I'll get you a spectrum... hold on...


Axel Emmermann
European Regional Vice President of the
Fluorescent Mineral Society
<http://www.uvminerals.org/>
=========================
Mineralogische Kring Antwerpen/Antwerp Mineralogical Society
<http://www.minerant.org/index.html>
Werkgroepleider/Workgroup leader: Fluorescerende mineralen/Fluorescent
minerals
Technische Realisaties/Engineering
My website:<http://users.pandora.be/axel.emmerman/home/>


> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]
> Namens Earl R. Verbeek
> Verzonden: woensdag 29 april 2009 17:07
> Aan: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'
> Onderwerp: RE: [Rockhounds] fossils
> 
> 
> I was just trying to point
> out that not all belemnites are chalcedony. <snip> I was hoping for
> a good fluorescent discussion, but that didn't happen either,
> dave
> 
> Wish I could oblige, Dave, and study some of your fluorescent fossils, but
I
> have only rare and occasional access to a fluorescence spectrophotometer
and
> thus cannot generate the emission spectra I'd need.  There's not much that
> can be done by eye, I'm afraid.  One could also do some fancy chemistry
work
> to extract the organic compounds present and identify them, on the premise
> that some of them are responsible for the fluorescence, but that's a
> complicated procedure too, and freeing organic material that occurs as
> molecular inclusions in a silica host might not be easy.  In chalcedony
(as
> opposed to macrocrystalline quartz), solvent extraction might work, but
I'm
> decades away from being a lab rat and really have no idea how to go about
> this.
> 
>          Cheers-   Earl
> 
> 
> --
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