[meteorite-list] Polishing Chondrite Slices

From: mark ford <markf_at_meteoritecentral.com>
Date: Thu, 3 May 2007 14:48:16 +0100
Message-ID: <6CE3EEEFE92F4B4085B0E086B2941B31293CBF_at_s-southern01.s-southern.com>

I've got a large Ghubara slice that was done by a Norwegian dealer (I
think maybe by Lars?), absolutely stunning, mirror finish, and actually
one of my best slices, looks an unearthly 'spooky black'! And I'd
recommend a mirror finish on a Ghubara any day! As for rustiness - Mines
stayed mint, Actually I have found that mirror polished slices keep
better than rough ones (though sometimes rough ones do show chondrules
better..)

Best
Mark


-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of
STARSANDSCOPES at aol.com
Sent: 03 May 2007 14:14
To: meteorite-list at meteoritecentral.com
Subject: Re: [meteorite-list] Polishing Chondrite Slices

Hi, This is Tom Phillips, the microscope guy, which really means the
polishing guy. I have to agree, Ghubara is both tough to polish with
out scratches
and when I revisited some polished slices I had made a year ago, all
were
good except the Ghubara. It had to be repolished before any scope
time.

Perhaps some one can suggest a sealing method that would work for your
sphere?

Tom


In a message dated 5/3/2007 4:27:37 A.M. Mountain Daylight Time,
marcin at polandmet.com writes:
I just bought a Ghubaro and plan to have part of it made into a sphere,

>obviously ;), and the rest will be cut into slices
>
> I would like to polish the slices and was wondering if anyone has any

> experience doing this.
>
> I have a variety of belt sanders and palm sanders but I don't know
what
> kind of abrasive to use, is there a specific type for polishing
"stone
> like" material?

Be carefull, becouse
primo, ghubara is hard and every scratch from grinding will be visible
on
polished slice.
secundo, Ghubara is one of the best ruster I have seen in chondrites.




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Received on Thu 03 May 2007 09:48:16 AM PDT