Leopard Print Dangle Earrings

Depends what's underneath the gold. Plating over stainless or titanium steel won't - steel doesn't react with sweat that way. Plating over copper or alloy can, because copper oxidizes against skin and the mark it leaves is green. It's harmless and it washes off. Check the material line on this page: it says which one this piece is.

Sterling silver will, eventually - that's silver reacting with sulfur in the air, and it goes black rather than green. A polishing cloth takes it off. Platinum-plated silver resists it for much longer. Gold plating doesn't tarnish; it wears, which is a different problem with the same look.

Water-resistant, not waterproof. Showers, swimming and hot tubs shorten the life of any plated piece - chlorine and salt are the worst of it. Take it off first and you'll double how long it looks new.

Stainless steel, titanium steel and 925 sterling silver are the safest bets here. Plated alloy is the one to avoid if nickel is your problem. If you react to cheap earrings, stay in the steel and silver collections.

Last on, first off - after perfume, lotion and hairspray, before the shower and the gym. Wipe it with a soft cloth after wearing. Store it dry and separate, in the pouch it came in. That's most of it.