[meteorite-list] the hambledon pallasite

From: Göran Axelsson <axelsson_at_meteoritecentral.com>
Date: Thu, 08 Feb 2007 17:44:41 +0100
Message-ID: <45CB5379.7010203_at_acc.umu.se>

As far as I'm concerned, that is not a pyrite crystal, it has the wrong
form for pyrite.
But it is the right form for a spinel group mineral (magnetite, spinel,
chromite, ...).
Magnetite is also a common mineral. Here in Sweden I wouldn't be
surprised by finding a small crystal like that in weathered rocks,
magnetite is very common in granites and other igneous rocks and very
resistant against weathering.
As I have no knowledge of the geological conditions where this pallasite
was found I can't say anything about how probably it is a terrestrial
crystal or not.

A simple test is to use a weak magnet to see if it is magnetite. But I
wouldn't do it on somebody else's meteorite.

Nice pictures and a very interesting pallasite.

  :-)

/G?ran

Dave Harris wrote:
> Not mine - Rob Elliott's - it's on loan for a show, but yep - that xl
> took a lot of looking at too - personally I think it is terrestrial.
> Under the 'scope the xl is embedded in the loose, almost Caliche type
> weathering on the very crust - it would need XRDing to check it out
> but I think it is a pyrite xl -silvery and not, as far as we can tell
> transparent/transclucent
> It is far out - what a slice of heaven I tell you!
> /-------Original Message-------/
>
> /*From:*/ Mr EMan <mailto:mstreman53 at yahoo.com>
> /*Date:*/ 02/08/07 13:29:12
> /*To:*/ Dave Harris <mailto:entropydave at ntlworld.com>; metlist
> <mailto:meteorite-list at meteoritecentral.com>
> /*Subject:*/ Re: [meteorite-list] the hambledon pallasite
>
> WOW Dave! that seems to be a complete euhedral crystal
> Is that a spinel, magnetite, chromite? Regardless
> perfect crystal growth like this in a meteorite is
> ultrarare.
>
> Is this one of the pyroxene bearing pallasites?
>
> Inquiring minds.
>
> Really interesting piece, Congratulations.
>
> Elton
> --- Dave Harris <entropydave at ntlworld.com
> <mailto:entropydave at ntlworld.com>> wrote:
>
> > HI everyone
> >
> > ..look what I got!
> http://tinyurl.com/2pjngj
>
>
>
>
>
> <http://www.incredimail.com/index.asp?id=409&lang=9>
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Received on Thu 08 Feb 2007 11:44:41 AM PST