I want polish a chain necklace with lapiz cabs and tigers eye
beads. I'd like to put it in tumbler but I'm not sure if the
stones will be ok. I do have a flex shaft and all the basic tools.
Could you please clarify what you mean by polish? Is it to make a
new piece shiny or to remove tarnish or to smooth and then burnish
Abrasive media that would smooth the chain will damage the finish on
the tiger eye and lapis. If you want to clean up tarnish, you can use
a Speed Brite and electronically clean the metal.
If you are talking about putting the chain in steel in a rotary
tumbler, the steel probably won’t harm the stone finish, but if they
have any flaw, no matter how tiny, the stones could be cracked or
To be safe, clean the piece by hand with a polish cloth. In no case
should you use any buffing machine or a flex shaft. Rotary machines
and chains never mix. Ever.