[Rockhounds] Need help with Mineral ID

Tue Jun 9 13:28:17 PDT 2009

Alex and Wes,
I know photo ID is not always easy nor reliable but I am pretty sure about this one.  As I sent before the pink is dolomite the white clear is calcite and I believe the small metallic crystals will be chalcopyrite on closer examination.  I would say 95% sure on ID.  The location sure looks like Black Rock Arkansas material.  I'm sure if you mindat search for pictures you should see something very similar.
Stan

--- On Tue, 6/9/09, Axel Emmermann <axel.emmermann at pandora.be> wrote:

> From: Axel Emmermann <axel.emmermann at pandora.be>
> Subject: RE: [Rockhounds] Need help with Mineral ID
> To: "'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'" <rockhounds at lists.drizzle.com>
> Date: Tuesday, June 9, 2009, 3:13 PM
> Hi Wes,
> 
> Raspberry is more purple than red, do we agree on that or
> does any of us
> have a wrong color in mind?
> 
> More purple could be indicative of calcite (crystal defects
> and chemical
> replacements of CO3 by CO2, OH, PO3 and such) all produce a
> bluish tint in
> the overall red fluorescence of manganese replacing
> calcium.
> 
> In dolomite, manganese replacing magnesium would produce a
> more orange
> color. Slightly so but measurable.
> 
> Still... that's all very theoretical. Should ever, by
> moving the specimen, a
> small piece break off I'll be glad to measure its
> fluorescent spectrum (for
> what it's worth ;-))). Don't go breaking of pieces now
> ;-)))
> 
> Cheers
>  
> 
> 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.telenet.be/axel.emmerman/FiatLux/Index.php
>  
>  
> > -----Oorspronkelijk bericht-----
> > Van: rockhounds-bounces at lists.drizzle.com
> [mailto:rockhounds-bounces at lists.drizzle.com]
> > Namens Wes Lingerfelt
> > Verzonden: dinsdag 9 juni 2009 17:37
> > Aan: Rockhounds at drizzle.com:
> A mailing list for rock and gem collectors
> > Onderwerp: Re: [Rockhounds] Need help with Mineral ID
> > 
> > Axel,
> > I used a 35 watt SW lamp on it and it glows medium
> strong in the pink
> > crystal area. A LW lamp does nothing at all. It was
> handed to me by a
> young
> > couple who inherited it from their grandfather
> (mineral collector) and
> they
> > have no idea where it came from or how long ago he
> acquired it. I'm not
> sure
> > I have the equipment to get down into the specimen and
> isolate a separate
> > image of the individual crystals. It would be nice to
> have had a catalogue
> > to refer to but that isn't possible. I still like the
> presentation it has
> > though; It's just lovely I think!
> > regards,
> > Wes
> > ----- 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: Tuesday, June 09, 2009 2:43 AM
> > Subject: RE: [Rockhounds] Need help with Mineral ID
> > 
> > 
> > > Wes, what's the locality?
> > >
> > > Can we get a detail of the specimen? One full
> size photo of one of those
> > > white crystals and a good one of one of the pink
> crystals.
> > >
> > > A good way to find out if it belongs somewhere in
> the range of calcite
> to
> > > rhodochrosite (or kutnohorite) is to check the
> phosphorescence. If it 's
> a
> > > manganese activated carbonate of calcium it will
> show a red flash if you
> > > quickly remove the UV lamp.
> > > Other red fluorescing minerals that are activated
> by chromium don't do
> > > that... Aragonite sometimes fluoresces reddish
> pink but the
> > > phosphorescence
> > > of those appears to be green (to the human eye).
> > >
> > > Cheers
> > >
> > > 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.telenet.be/axel.emmerman/FiatLux/Index.php
> > >
> > >
> > >> -----Oorspronkelijk bericht-----
> > >> Van: rockhounds-bounces at lists.drizzle.com
> > > [mailto:rockhounds-bounces at lists.drizzle.com]
> > >> Namens Wes Lingerfelt
> > >> Verzonden: dinsdag 9 juni 2009 7:17
> > >> Aan: rockhounds at lists.drizzle.com
> > >> Onderwerp: [Rockhounds] Need help with
> Mineral ID
> > >>
> > >> http://www.flickr.com/photos/wirewrap/sets/72157619389520369/
> > >>
> > >> Does anyone out there recognize this mineral?
> I think it is Manganoan
> > > Calcite. It has Pyrite
> > >> scattered all over it and it Fluoresces deep
> Raspberry Red under short
> > > wave UV. Any help will
> > >> be appreciated.
> > >> Wes Lingerfelt
> > >>
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