[Rockhounds] fossils

[Lawrence Rush]

I can verify that my Belemitella Americana from New Jersey fluoresce a pale 
yellow.

Larry Rush

================================================
----- Original Message ----- 
From: "Gene Hartstein - Fossilnut.com" <gene at fossilnut.com>
To: "Rockhounds at drizzle.com: A mailing list for rock and gem collectors" 
<rockhounds at lists.drizzle.com>
Sent: Friday, May 01, 2009 7:43 PM
Subject: Re: [Rockhounds] fossils


> All the Sewell Belemnites I have ever seen fluoresce a yellow white.
>
> Gene
> ----- Original Message ----- 
> From: "Axel Emmermann" <axel.emmermann at pandora.be>
> To: "'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'" 
> <rockhounds at lists.drizzle.com>
> Sent: Friday, May 01, 2009 10:06 AM
> Subject: RE: [Rockhounds] fossils
>
>
>> That 's not logical, Gene.
>> Aragonite can absorb uranyl, calcium doesn't (I don't know if it even 
>> can).
>> More likely there are some thin layers of uranyl bearing hyalite
>> incorporated in the calcite (if it is that).
>> That would explain the green fluorescence.
>>
>> I think this may need confirmation from a professional but I'm pretty
>> sure...
>>
>> 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 Gene Hartstein - Fossilnut.com
>>> Verzonden: donderdag 30 april 2009 5:08
>>> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
>>> Onderwerp: Re: [Rockhounds] fossils
>>>
>>> The Sewell belemnites are calcite... I believe, not aragonite. The
>>> Belemnites from one location in Mullica Hill, not far from Sewell are
>>> Vivianite.
>>>
>>> Gene Hartstein
>>> ----- Original Message -----
>>> From: <betdav97 at aol.com>
>>> To: <rockhounds at lists.drizzle.com>
>>> Sent: Tuesday, April 28, 2009 10:21 PM
>>> Subject: Re: [Rockhounds] fossils
>>>
>>>
>>> > the ones I am referring to?are Belemnitella americana,
>>> > Chestnut Creek, Sewell, New Jersey.?
>>> > dave?
>>> >
>>> >
>>> > -----Original Message-----
>>> > From: Kreigh Tomaszewski <Kreigh at tomaszewski.net>
>>> > To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
>>> > <rockhounds at lists.drizzle.com>
>>> > Sent: Tue, 28 Apr 2009 7:46 pm
>>> > Subject: Re: [Rockhounds] fossils
>>> >
>>> > Interesting. I never thought of sticking my belimnites under a black
>>> > light. They were a bright yellow. Chalcedony, collected at Pierre, 
>>> > SD.?
>>> > ?
>>> > Kreigh?
>>> > ?
>>> > On Tuesday, Apr 28, 2009, at 12:45 America/Detroit, Earl R. Verbeek
>>> > wrote:?
>>> > ?
>>> >>?
>>> >> Axel,?
>>> >> ? I noticed your belimnites are chalcedony. Ours on this side of the?
>>> >> Atlantic are the same color, but aragonite. You would have thought?
>>> >> your chalcedony ones would be green, since many chaledony items?
>>> >> fluoresce green here.?
>>> >> dave?
>>> >>?
>>> >> Hi Dave and Axel,?
>>> >>?
>>> >> "Our" chalcedonies often fluoresce green due to trace amounts of >
>> uranyl
>>> >> ion.?
>>> >> This is particularly common in the desert Southwest, where volcanic >
>>> >> rocks?
>>> >> abound. Uranium is strongly partitioned in silicic magmas and hence 
>>> >> is?
>>> >> concentrated in dacites and rhyolites, from which it is readily >
>> leached
>>> >> into?
>>> >> the groundwater system and incorporated into chalcedony vein fillings 
>>> >>  >
>>> >> and?
>>> >> "chalcedony roses" in large vesicles. You'll see the same response, >
>> for
>>> >> the?
>>> >> same reasons, in much petrified wood. In wood, however, there are 
>>> >> also?
>>> >> remnant organic molecules that often cause pale yellow to orange?
>>> >> fluorescence, and in places you'll find this combined with the uranyl 
>>> >>  >
>>> >> green.?
>>> >> I've seen many samples of chalcedony that fluoresce yellow, similar 
>>> >> to?
>>> >> Axel's belemnites.?
>>> >>?
>>> >> Cheers- Earl?
>>> >>?
>>> >> PS: This note has been stuck in the queue for some time now, and I've 
>>> >>  >
>>> >> no?
>>> >> idea when it will be sent. Had that same problem yesterday, too. >
>>> >> Apologies?
>>> >> if this is "old news" by the time it's posted....?
>>> >>?
>>> >>?
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