[meteorite-list] Hard to Polish Meteorites - Any Ideas?

[Ed Deckert]

Hi Mike,

Perhaps the Hupé's "trade secret" is using diamond polishing media at a much 
higher/finer grit than you are using?  It may be worth a try.

Adam & Greg, can you share your secret?

Ed

----- Original Message ----- 
From: "Michael Gilmer" <meteoritemike at gmail.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Friday, October 28, 2011 9:06 AM
Subject: [meteorite-list] Hard to Polish Meteorites - Any Ideas?


> Hi List,
>
> Some meteorites are hard to polish or just won't take a proper polish.
> Allende is one example that comes to mind readily.
>
> I've got an endcut of NWA 801 CR2 that came from the Hupe Collection.
> It has a wicked glossy polish on it that accentuates the chondrules.
>
> I'm working on some CR2 slices that need polishing and they won't take
> a decent polish.  I can get the saw marks out, but beyond that I can't
> get a polish to take.  The more I try, it just muddies up the matrix
> and subdues the features.  The metal fleck and rings around the
> armored chondrules come out nicely, but the rest of the specimen
> becomes muddy and the chondrules fade into the matrix.  What am I
> doing wrong?  This particular CR2 is similar to NWA 801, but a little
> more weathered.  Could that have something to do with it?
>
> Do the Hupes have some magic trade-secret technique?  Or am I
> overlooking something obvious?
>
> I started out with 320 grit and then progressed to 400, 600, and 800
> grit - hand sanding, dry, on wet/dry sandpaper.
>
> Best regards,
>
> MikeG
>
>
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