It sounds like I need a tumbler! Can you put finished jewelry
with any/all types of stones in? What about ear posts? Other
Generally, stones that are porous ( torquoise, azurite, malachite,
etc) shouldn’t be put in a tumbler. Also stones that may have been
oiled (emeralds etc) shouldn’t go in a tumbler.
Delicate items (filegree, wire items) & parts can go in without any
problems. The ear posts won’t present any problems.
Just be sure the scratches are all out. Tumblers won’t remove
scratches! Dull scratches in, shiney scratches out.
If you are looking for a tumbler, I’d suggest the vibratory tumbler.
They’re faster, easier to maintain & use. Fewer moving parts & less
expensive. The best place to buy them is from a shooting sports
store. They’re less expensive there than from jewelry suppliers.
Folks who reload their own ammo use them to polish their brass.
For shot, go with the assorted shapes of stainless steel shot for
work in the typical shop. The stainless is more expensive (about
$15.00/lb) but it’s easier to maintain & you don’t have to worry
about it rusting. This you’ll probably have to get from a jewelers
supply, I haven’t found another source yet.