[meteorite-list] Purple (or bluish green) in a (stone) meteorite

From: Pete Pete <rsvp321_at_meteoritecentral.com>
Date: Sat Oct 1 10:46:42 2005
Message-ID: <BAY104-F180A1B3BBA4AEC1BE562D4F88E0_at_phx.gbl>

Thanks, everyone, for taking the time to look, and your valued opinions.

The consensus seems to be ringwoodite.

Marc Fries has generously volunteered to personally examine the meteorite.

I'll let the list know what the final analysis is. Hopefully, it won't be
something embarrassing, like a piece of my daughter's crayon :].

Cheers,
Pete

From: "Marc Fries" <m.fries_at_gl.ciw.edu>
Reply-To: m.fries_at_gl.ciw.edu
To: meteorite-list_at_meteoritecentral.com
Subject: Re: [meteorite-list] Purple (or bluish green) in a (stone)
meteorite
Date: Fri, 30 Sep 2005 17:37:04 -0400 (EDT)

Greetings

    Here's another possibility - ringwoodite is a blue/purple mineral that
is a shock-metamorphic polymorph of olivine. It's quite pretty,
actually, and has been noted in several meteorites. It would take some
'splaining to put it in the middle of a troilite grain, but what the
hell, eh?

Cheers,
MDF

> Hello again,
>
> I forgot to mention that I found a similar-looking inclusion in my
> NWA 1584 (LL5) slice when I looked at it under my microscope last
> January 29.
>
> I can send Jeff K. from "Down Under" a copy of the JPEG so that
> he can put it on his website for everyone to look at in case they
> are interested. I described it as "bluish-purple/vilet inclusion".
>
> Considering my age, I may see colors slightly different from what
> "younger eyes" see - people who are into visual astronomy know
> about that phenomenon.
>
> Cheers,
>
> Bernd
>
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Marc Fries
Postdoctoral Research Associate
Carnegie Institution of Washington
Geophysical Laboratory
5251 Broad Branch Rd. NW
Washington, DC 20015
PH: 202 478 7970
FAX: 202 478 8901
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Received on Sat 01 Oct 2005 10:46:39 AM PDT