Post by Yssie » May 5th, 2010, 10:29 am
I have heard both:

1. Plat./silver are softer and more easily scratched than gold, so gold rings/pendants will eat plat./silver rings/chains (though plat. can presumably be repolished with negligible metal loss).

2. Plat./silver are soft, so they pick up grit and become abrasive, and will eat away at adjacent gold which does exhibit this property.

What actually happens?
Some circumstantial evidence is very strong, as when you find a trout in the milk.