[meteorite-list] Tektit "Muong Nong" and cutting

[James Tobin]

Dear List,
Paul and I have several large pieces of Muong Nong that we have been cut and 
polished to near optical flatness. It is a long and difficult process taking 
about 60 hours. First grinding on a vibrating lap and then polishing on a 
wet lap charged with cerium oxide. Polishing is about 40 hours of the 60. 
But the lap s can handle several pieces at the same time.  The results are 
fabulous. I don't know if the specimens are currently in our catalog at 
meteorite.com but maybe we can feature them as the Tektite of the Month in 
the next Meteorite Times.

The polished surface is so flat that the microscopic differences in strain 
on the glass that are relieved at the edges can be seen in the surface. They 
have been at our tektite parties maybe some of the attendees can comment 
further. It has been one of the most challenging and rewarding things Paul 
and I have done with the vast amount of Muong Nong we have. Wish we had time 
to keep the lap running more.

Looking forward to seeing many of you at Tucson. Cheers, Jim



----- Original Message ----- 
From: "Meteoryt.net" <marcin at meteoryt.net>
To: <meteorite-list at meteoritecentral.com>
Sent: Wednesday, January 12, 2005 7:48 AM
Subject: [meteorite-list] Tektit "Muong Nong" and cutting


> Hello
> Anyone try cut Muong Nong tektites ?
> I know, this is maybe destroying specimen, but from the other side this 
> can
> show interesting structure inside. Anyone ever see something like this 
> ?????
>
> Any opinion ?
>
> -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
> http://www.Meteoryt.net             marcin at meteoryt.net
> http://www.PolandMET.com       marcin at polandmet.com
> http://www.Gao-Guenie.com      GSM +48(607)535 195
> --------[ Member of Polish Meteoritical Society ]--------
>
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