If they are an alloy, they will eventually rust.
How long will it t take a quarter to rust in fresh water
a long time
It depends on the quality of the nail. If it is painted it Amy take long to rust. In general it may take a month or so for the nail to rust.
a week it take or two
5 months
50 years
A very long time. Longer than you probably have.
Aluminum does not rust. Alumininum can also be anodized to keep it from corroding when salt and other contaminats get on it.
Copper does not rust; it develops a greenish film called patina when exposed to air and moisture. The formation of patina can take several years, depending on the environmental conditions.
a few weeks
It really depends on the quality of the earing an if u wear it like in shower or not if u do it won't take long at all