[meteorite-list] Zacatecas (1792) on ebay

[Michael Fowler]

I collect ungrouped irons, and am looking for a slice of Zacatecas  
(1792) an ungrouped iron.

The specimen on ebay:

http://cgi.ebay.com/Meteorite-ZACATECAS-1792-perfect-etched-slice-12-3g_W0QQitemZ270389277772QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ef474f44c&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A3%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A5%7C294%3A50#ebayphotohosting

does not in my opinion look like the photo in Buchwald, or match his  
description:

"Zacatecas is remarkable in that it belongs to the rather few  
polycrystalline iron meteorites.  The grain size ranges from 1 to 5  
cm, a variation which is partly due to the random sectioning through  
many almost equiaxial grains.  .......   The grain boundaries are also  
conspicuous because of the copious development of very irregular 1-3  
mm wide zones of swathing kamacite.  This kamacite was nucleated by  
the troilite and schreibersite precipitates, and by the boundary  
itself, and grew significantly before the bulk of the grains  
transformed during the primary cooling period.
......
Zacatecas may have shown a kamacite bandwith ot one time of .6 -1.0  
mm, but since all taenite eventually disappeared and significant grain  
growth in the kamacite took place, no well defined Widmanstatten  
pattern is present now.  In this respect, Zacatecas resembles New  
Baltimore, Santa Rosa and Chihuahua City."

So in short, no well defined Widmanstatten pattern, unlike the photo  
in the ebay ad.

Would anyone like to comment?

Thanks,

Mike Fowler
Chicago

ebay--starsandrocks