[meteorite-list] Is This All Olivine

From: Dave Mouat <dmouat_at_meteoritecentral.com>
Date: Thu Apr 22 09:54:05 2004
Message-ID: <3C6EFF89.3817C45A_at_dri.edu>

Dear Listees
I hang my head in shame for not reading all of the postings before spamming
Dave

David Freeman wrote:

> Dear Mark,
> Only the gem variety is called peridot.
> Dave F.
>
> Mark Miconi wrote:
>
> >Wouldn't/isn't terrestrial Olivine called Peridot anyway?
> >
> >Mark
> >----- Original Message -----
> >From: Dave Mouat <dmouat_at_dri.edu>
> >To: DiamondMeteor <DiamondMeteor_at_hotmail.com>
> >Cc: meteorite-list <meteorite-list_at_meteoritecentral.com>
> >Sent: Friday, February 15, 2002 10:42 AM
> >Subject: Re: [meteorite-list] Is This All Olivine
> >
> >
> >>Mohamed
> >>I'm not sure what you mean by the word "large" as in "Olivine is rarely
> >>
> >found in
> >
> >>large sizes" but in ultramafic rock exposures (some classic localities in
> >>
> >Oman,
> >
> >>by the way) we can find pure unserpentinized olivine in masses the size of
> >>
> >the
> >
> >>Hoba meteorite (60 tons) and larger. We find entire mountains of
> >>
> >serpentinized
> >
> >>to somewhat serpentinized olivine. So, the presence of olivine would not
> >>
> >be
> >
> >>diagnostic of a meteoritic origin. Isotopic (and other chemical) analyses
> >>
> >would
> >
> >>be diagnostic.
> >>Dave
> >>
> >>DiamondMeteor wrote:
> >>
> >>>Dear List;
> >>>I found few rocks that look all composed of Olivine,, and I have read
> >>>
> >before
> >
> >>>that Olivine is rarely found in large sizes. I have measured its
> >>>
> >specific
> >
> >>>gravity and found it to be around 3.3 (Olivine: 3.2), its hardness and
> >>>
> >also
> >
> >>>its color is close to Olivine.
> >>>Some rocks have very thin fusion crust.
> >>>Please have a look,, and I would be delighted to hear your openion.
> >>>http://pages.britishlibrary.net/mhy10/meteor/olv.htm
> >>>
> >>>Best Regards
> >>>Mohamed
> >>>----------------------------------------------------------------------
> >>>http://pages.britishlibrary.net/mhy10/meteor/index.html
> >>>===============================================
> >>>"As vision grows expression becomes difficult.", AnNiffari
> >>>
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> >>
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> >
> >
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Received on Sat 16 Feb 2002 07:55:37 PM PST