[meteorite-list] Polishing Chondrite Slices

[mark ford]

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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