[meteorite-list] Shirokovsky etching

[Meteoryt.net]

Hi
Some time ago I win from FinMet cool iron-rich slice of my favorite
"pallasite" Shirokovsky.
I buy it for 2 reasons:
1) becouse its cool looking and different from all other slices I know
2) to check what will happend if I try etch it.

So when It arrived I make my duty. I used 5% solution on mirror polished
surface.
Top part become mat/dull verry fast but bottom part is still like before,
mirror

My question is what it is ? Why this pattern looks like this ?

http://www.meteoryt.net/ebay/shirokovsky_112a.jpg
http://www.meteoryt.net/ebay/shirokovsky_112b.jpg
http://www.meteoryt.net/ebay/shirokovsky_112c.jpg
http://www.meteoryt.net/ebay/shirokovsky_112d.jpg


-----[ 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 ]--------