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Meteorite re-etching?

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#1 BYoesle

BYoesle

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Posted 30 September 2013 - 12:36 PM

I have a piece of jewelry containing a 25 mm x 1.5 mm round piece of nickle-iron meteorite which needed repair, and the main piece had also become significantly rusted. I took the piece to be repaired to a professional jeweler and had him polish off the “rust” with jewelers diamond powder, but this seems to have also removed the nice crystalline pattern (I know :foreheadslap: ), leaving only a nice smooth and shinny surface.

Do I have to use a different polishing compound, or do I just need to re-etch the meteorite, and what is the best method to accomplish this?

Is there any way to prevent rusting in the future?

Thanks for your help.

#2 lee14

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Posted 30 September 2013 - 08:10 PM

There's a discussion of etching techniques under the thread 'Best Etched Meteorites', a few topics down. The desireable surface condition prior to etching varies with types, but a fine matte appearance usually produces a good etch. I find that gun oil is the best inhibitor for rust, but this isn't really appropriate for jewelry. A good metal polish like 'Flitz' will help guard against corrosion, but excessive rubbing will diminish the etch. I'm not a big fan of protective coatings because they can seal in moisture, but that might be the best bet here. After etching, thoroughly dry the piece for an hour at 200 degrees, and then spray it with lacquer. 'Paleobond' has a good system for treating and coating specimens, but it might be a little too involved for one small piece. You can search online for their products.

Lee

#3 BYoesle

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Posted 01 October 2013 - 09:33 AM

Thank you so much for the information Lee! :jump:






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