[meteorite-list] the hambledon pallasite

[Göran Axelsson]

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.

  :-)

/Göran

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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