[Rockhounds] fossils

[Gene Hartstein - Fossilnut.com]

Clothing and laundry detergents  fluoresce a bright white. Take a lamp into 
your laundry room with the lights out. The effect is disturbing... white 
everywhere. Laundry detergents contain optical brighteners, synthetic dyes 
that absorb UV light and reemit it as visible white light... making laundry 
appear whiter than white. I used to work where they were synthesized
Gene Hartstein
----- Original Message ----- 
From: <betdav97 at aol.com>
To: <rockhounds at lists.drizzle.com>
Sent: Wednesday, April 29, 2009 1:36 PM
Subject: Re: [Rockhounds] fossils


> My wife has a pair of tennis shoes that fluoresce two colors, some day
> I will add them to the UV display
>
>
> -----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: Wed, 29 Apr 2009 1:27 pm
> Subject: RE: [Rockhounds] fossils
>
>
>
> Really Kreigh... you should stick EVERYTHING under the UV-lamp.
> You never know what may fluoresce...
> I had a friend who had a argument with his wife because he wanted to test
> her for fluorescence... May sound weird but yes, us fanatics are out there
> ;-)))
>
> Axel
>
>> -----Oorspronkelijk bericht-----
>> Van: rockhounds-bounces at lists.drizzle.com
> [mailto:rockhounds-bounces at lists.drizzle.com]
>> Namens Kreigh Tomaszewski
>> Verzonden: woensdag 29 april 2009 1:47
>> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
>> Onderwerp: 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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