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Tarnish on moonstone beads
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=38&t=17884
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Author:  rachel [ Tue Mar 19, 2013 5:47 pm ]
Post subject:  Tarnish on moonstone beads

Hi,
I am repairing a clients moonstone bead necklace. The moonstones have "tarnish" from the beading wire in the drill holes. I have tried warm soapy water, which didn't work. Any suggestions?
Thanks so much.

Author:  Barbra Voltaire, FGG [ Tue Mar 19, 2013 5:53 pm ]
Post subject:  Re: Tarnish on moonstone beads

To begin with, Rachel, we have moved your post out of the section entitled "Forum Disclaimers"
Please be more careful when choosing where to post.

To answer your question, I would try a Sunshine Cloth for the areas around the drill holes.
One needs an abrasive with a hardness greater than the metal and softer than the feldspar.
To remove tarnish within the drill holes, I suspect you would need to get inside every drill hole with an abrasive....a reamer of sorts.

Does anyone have any ideas about a "dip" which might work?

Author:  rachel [ Thu Apr 04, 2013 12:25 am ]
Post subject:  Re: Tarnish on moonstone beads

Thanks Barbara, I had very good success with a diamond bit reammer. it was not quite thin enough to reach the very centre of the beads but it was a huge improvement!

Author:  Alan F. [ Thu Jul 30, 2015 4:07 pm ]
Post subject:  Re: Tarnish on moonstone beads

Probably a bit late now, but I have had great success with a bamboo slip (which will split down really fine) then charge it with toothpaste or other mild abrasive and use the flex drive to spin it inside the hole. A run through the ultrasonic then cleans everything out. When restringing the necklace, use the nylon coated wire. A little more expensive but doesn't mark the inside of beads.

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