[meteorite-list] R: iron meteorite natural color
From: Francesco Moser <cojack_at_meteoritecentral.com>
Date: Sat, 26 Nov 2016 17:19:20 +0100
Marcin and Doug!
Thanks for your replys!
Ok, I understand what you mean about the authenticity of color.
For sure the desert varnish of some iron meteorite like Gibeon or Henbury is
the most natural looking for a find (not fall) meteorite.
But old and buried meteorite like Muonionalusta or Campo have a very thick
rust and oxide crust, I suppose no one want to have that on his irons.
So after remove and clean all the rust shale what remains? Grey nude iron
... it is absolutely not natural!!!
So for me on this type of meteorite the black surface is something better
that the nude iron, isn't?
Of course I don't want to paint the meteorite, just convert the nude grey
iron to dark.
How it is possible? With oil?
All the Campo that are on the market have nude dark iron on the surface, how
can I reach the same looking starting from nude grey iron results of sand
Da: Meteorite-list [mailto:meteorite-list-bounces at meteoritecentral.com] Per
conto di Marcin Cimala - POLANDMET via Meteorite-list
Inviato: gioved? 24 novembre 2016 23:42
A: Meteorite-list at meteoritecentral.com
Oggetto: Re: [meteorite-list] iron meteorite natural color
> I have a question.
> As we know an iron meteorite, such like Campo del Cielo for example,
> have a black surface.
> I have here a deeply rusted Campo, I'm planning to remove rust with a
> sand blasting process.
> But with this I will obtain a greysh surface, like naked iron, the
> same color of a slice.
> Not really a natural color for the exterior of an iron meteorite and
> also not aestetically pretty, looks too artificial for me.
> There is something to do for restore the original black color?
> Or it's better to remove the rust with a traditional steel brush,
> maybe with a drill ???
> Tips for mechanical or chemical process are welkomme!!!
> I can try with the classical NaOh bath, I have also Phosphoric, Citric
> and Oxalic acid :)
Hah good question Francesco. But what is natural color of meteorite at all ?
Desert sandblasted NWA is not a real looking meteorite? Should I paint them
black to be looking like a real meteorites ? Poor Dhofars....
This is what Im fighting long time. Strange stereotype that meteorite MUST
BE BLACK outside, WHY ?
When You like Your girlfrend ? When he smile to You with his pretty face or
when she put ton of Max Factor chemicals on it??
I have always strange taste, different than most of collectors. For me, if
specimen have crust must be black or black with rusty patina. If meteorite
have no more crust like Campo, why to "paint" it to black to looks like
Sikhote ? Then You will see paint, not Your meteorite. I only can imagine
what strange things they do to clean Campo and look it like that. LOL
OK now a few tips.
As I understand Your Campo is a complete specimen ? To remove deep rust You
must use electrochemical cleaning + brush + small hammer. Then You will get
mostly cleaned meteorite with BLACK remains of rust that will make Your
meteorite looks REAL.Then heat it and put alot of oil to make it looks fresh
and oriented :)
-----[ MARCIN CIMALA ]----[ +48 793567667 ]-----
--------[ Member of Polish Meteoritical Society ]--------
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