[Rockhounds] Help! Has anyone ever seen or heardof blackTorbernite?

[Axel Emmermann]

If you are VERY lucky, you have a specimen of Vochtenite (LOL, just kidding)

There are only two specimens of this mineral and Renaud Vochten has lost
his. one remaining! 

 

Axel 

> -----Oorspronkelijk bericht-----

> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]

> Namens Kreigh Tomaszewski

> Verzonden: zondag 15 maart 2009 20:02

> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors

> Onderwerp: Re: [Rockhounds] Help! Has anyone ever seen or heardof
blackTorbernite?

> 

> Thanks Axel! And in interesting website too.

> 

> All the references I had for Metatorbornite just listed it as dark

> green, and this is definately black.

> 

> Kreigh

> 

> 

> On Sunday, Mar 15, 2009, at 05:57 America/Detroit, Axel Emmermann wrote:

> 

> > Kreigh,

> >

> > I found a reference that may make sense:

> > http://www.uraniumminerals.com/UTh/M-Torbernite.htm

> >

> > Meta-torbernite is sometimes nearly black and occurs as a pseudomorph

> > after

> > torbernite. There are several degrees of dehidratation and it appears

> > that

> > the color (pale green to almost black) is greatly influenced by

> > formation

> > process.

> >

> > Axel

> >

> >

> >

> >> -----Oorspronkelijk bericht-----

> >> Van: rockhounds-bounces at lists.drizzle.com

> > [mailto:rockhounds-bounces at lists.drizzle.com]

> >> Namens Kreigh Tomaszewski

> >> Verzonden: zondag 15 maart 2009 4:39

> >> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem

> >> collectors

> >> Onderwerp: [Rockhounds] Help! Has anyone ever seen or heard of

> > blackTorbernite?

> >>

> >> Hey List,

> >>

> >> I recently acquired two specimens of Torbernite from Bendada Quarry in

> >> Portugal. Both of the specimens are mostly beautifully formed, bright

> >> green, torbernite crystals, up to 6 mm, standing on edge, in a

> >> beautiful patchwork coating. I have absolutely no doubt about the

> >> Torbernite identification for the green crystals.

> >>

> >> However, both specimens have a portion that is covered with what looks

> >> like black torbernite crystals. On both specimens there are a few

> >> crystals that are half green and half black.

> >>

> >> I've never heard of black torbernite. I'm guessing a pseudomorph, but

> >> what the heck could it be? Torbernite without the Uranium? What would

> >> that be?

> >>

> >> I did find one Torbernite specimen for sale from the quarry that

> >> included Nsutite (which is not listed by Mindat for the locality) as a

> >> black secondary mineral, but it doesn't make sense chemically to me.

> >>

> >> Do any of you experts have a suggestion for what I have acquired in a

> >> trade? I want to make a good label, but I'm stumped.

> >>

> >> Kreigh

> >>

> >>

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> 

> 

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