[nanomonkey]

More modern jewelry manufacturers are moving towards this. There are laser welders with glove boxes and microscopes that are auto shielding, also cnc milling machines in completely enclosed environments where the lubricants that are sprayed on the milling ends are filtered for metal.

I was a jeweler for a couple years and the common practice was to have carpet and a sticky trap at the door. The carpet was torn up every few years and used to throw a company vacation.