[Rockhounds] Need help with Mineral ID

Tue Jun 9 16:39:34 PDT 2009

To All:

I would concur with the dolomite, calcite and chalcopyrite as I had a number of these specimens from Black Rock years ago.

Larry Bull

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> Date: Tue, 9 Jun 2009 13:28:17 -0700
> From: rgangue at yahoo.com
> Subject: RE: [Rockhounds] Need help with Mineral ID
> To: rockhounds at lists.drizzle.com
> 
> 
> 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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