[Rockhounds] ID help

Wed Jun 24 08:49:03 PDT 2009

Amblygonite? Hasve found some that fluoresces a very pale pink under SW from 
the Rubikon Lithium Mine, near Karibib, Namibia

Horst

----- 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 23, 2009 10:07 PM
Subject: RE: [Rockhounds] ID help

> Could you state the UV-band? LW, SW, medium wave or blue light.... That
> really matters ;-)))
>
> Is that an "intense" fluorescence or rather weak or medium strong?
> Would you describe the red as "cherry" or more a "velvety" red?
> Any "purple" in it or just plain red?
>
> I think the topaz is out.... That would fluoresce yellow or whitish.
> Diopside too, that would more likely fluoresce blue.
> Ziosite is not likely to fluoresce... Except thulite, the manganoan 
> zoistite
> which fluoresces orange to pink.
> Amblygonite??? Haven't heard of any fluorescence...
>
> Corundum??? That is certainly a good candidate! The diamond-shaped
> cross-section is indicative of that....
>
> Don't discard the feldspars yet... but try a blue laser. If they fluoresce
> REALLY hard in a blue laser beam then it is most likely corundum. A 
> spectrum
> would tell....
>
> I tried the crystals that you sent me... even the blue "sapphire" 
> fluoresces
> in blue laser light!
> If you stop and think about how the blue color is caused by iron... Iron
> quenches fluorescence in many minerals. Still in blue laser light... I'll
> try to make a photo, one of these days ;-)))))
>
> OK, lI'll bet it's corundum.
>
> Cheers
>
> Axel
>
> 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 Lawrence Rush
>> Verzonden: dinsdag 23 juni 2009 21:01
>> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
>> Onderwerp: Re: [Rockhounds] ID help
>>
>> Aha! They fluoresce a deep dark red! But, too hard for
>> feldspar.......getting any closer, Axel?
>>
>> Larry
>> ----- 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 23, 2009 2:51 PM
>> Subject: RE: [Rockhounds] ID help
>>
>>
>> > Larry,
>> >
>> > Topaz would have a distinct cleavage.
>> > It breaks very easily in a plane that is perpendicular to the C-axis.
>> > If you'd drop one of those hey would easily shatter and break at the
> basal
>> > plane.
>> > I don't see that in you photos.
>> > If I were to bet... some feldspar? Orthoclase? Microcline?
>> > But zoisite and amblygonite are also possible...
>> >
>> > Any fluorescence?
>> > Come on, Larry... make it shine ;-)))
>> >
>> > Cheers
>> >
>> > Axel
>> >
>> >
>> > 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 Lawrence Rush
>> >> Verzonden: dinsdag 23 juni 2009 18:51
>> >> Aan: rockhounds at lists.drizzle.com
>> >> Onderwerp: [Rockhounds] ID help
>> >>
>> >> I just got a box of minerals from Pakistan which contained 2 pieces of
> an
>> > unidentified
>> >> material. These are unfamiliar to me, and I need some help.
>> >>
>> >> The color is a sea green, translucent. The crystals are well formed,
>> > appear to be perhaps
>> >> Tetragonal or Orthorhombic. They have 4 distinct sides, diamond-shaped
> in
>> > cross section,
>> >> with  sharp low angle edges on 2 sides. The hardness is greater than 
>> >> 6.
>> > The matrix is quartz,
>> >> evidently a pegmatite mineral. No locality, but all of the others from
>> > this supplier were from
>> >> Afghanistan, Pakistan, and Waziristan.
>> >>
>> >> I suspect they are Topaz, but the shape and color have me questioning
>> > this.
>> >>
>> >> I posted photos on http://www.connroxminerals.com/temp.html
>> >>
>> >> Any thoughts?
>> >>
>> >> Thanks...Larry
>> >>
>> >>
>> >>
>> >>
>> >> "Noel Coward thought work was more fun than play,  but he never, ever
>> > worked in the mines"
>> >>
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