Material & Care
It's not your skin. It's not the jewelry being cheap, exactly, either. It's chemistry — and once you know what's actually happening, it stops being mysterious and starts being obvious.
Copper oxidises when it meets the mild acids in your sweat and skin. That reaction produces copper salts, and copper salts are green. That's the entire mechanism — a chemical reaction, not a sign of dirt or of unusual skin.
Most "gold" or "silver" costume jewelry is actually brass underneath, and brass is a copper alloy. The thin plating on top wears at contact points within weeks, exposing the copper-containing metal directly to your skin — and the reaction starts.
These get confused constantly, and they need different fixes.
Green staining is copper oxidation. It's harmless, it washes off with soap, and it stops the moment the copper-containing metal stops touching your skin.
An itchy, red, sometimes blistered rash is a nickel allergy — a real immune response, not a stain. If that's what you're getting, the fix isn't cleaning; it's avoiding nickel-releasing metals entirely.
Clear nail varnish painted on the inside of a band creates a barrier between the metal and your skin. It works — for about two weeks, until it wears off and you're reapplying it again.
The permanent fix is buying jewelry with no copper in the metal touching your skin at all. 316L stainless steel contains no copper, so there's nothing to oxidise — the reaction simply has nothing to work with.
Copper in the metal (usually brass underneath thin plating) reacts with the mild acids in your sweat, forming green copper salts. It's a chemical reaction, not dirt or a flaw in your skin.
No — copper-based green staining is harmless and washes off with soap. It's different from an itchy red rash, which signals a nickel allergy and needs a different fix.
Solid gold doesn't, because it contains no copper. Gold-plated jewelry can, if the base metal underneath the plating is brass and the plating has worn through.
Anything with no copper in the metal touching your skin — 316L stainless steel and solid gold both qualify, since neither contains copper for the reaction to use.
Nail varnish buys you a fortnight. Buying steel fixes it for good.