Why Does Jewellery Turn Your Skin Green?

Jewellery turns your skin green when copper in the metal reacts with sweat and the natural acids on your skin. The reaction forms a thin green film that rubs off wherever the piece touches you. It's harmless, it washes off, and it almost always comes from brass, copper, or a cheap plating that has worn through to a brass base.

The reassuring part: it's entirely avoidable. Below, we explain where the mark comes from, which metals cause it, how to get it off and how to choose jewellery that won't leave it in the first place.

Worn every day, and no green line underneath. Featured: Cuban (Gold) 4mm.

Jump to:

• What the green mark is
• Which metals cause it
• Why chains mark your neck
• Getting it off your skin
• Stopping it happening
• Green, black or red marks
• Jewellery that won't turn you green
• FAQs

What That Green Mark Actually Is

Copper is a reactive metal. When it meets moisture, salt from sweat and the slightly acidic surface of your skin, it oxidises and forms copper compounds, the same family of green-blue salts you see on old statues and copper roofs. On jewellery, that coating is microscopically thin, and it transfers to your skin wherever the metal sits against it.

That's why the mark follows the exact shape of the piece: a band around your finger, a line along your neck, or a ring around your wrist. It isn't a stain in your skin and it isn't a burn. It sits on the surface and comes away with soap.

So the question is never really "why is my skin reacting?" It's "what is this piece actually made of?"

Which Metals Turn Your Skin Green?

Some metals almost always leave a mark, some can once a finish wears away, and some won't at all. Here's how the common ones compare:

Metal	Will it turn your skin green?
Copper	Yes, and quickly. Pure copper is the most reactive metal in jewellery.
Brass and other copper alloys	Yes. Brass is mostly copper, and it's also the usual base for cheap jewellery.
Nickel silver (also sold as German silver or alpaca)	Yes. Despite the name, it contains no silver and is largely copper.
Gold or silver plating over brass	Not at first. Once the plating wears thin, the brass underneath reaches your skin.
Gold plating over stainless steel	No. There's no brass or copper base to show through.
Stainless steel	No. It isn't a copper alloy, and it releases very little nickel.
Solid sterling silver	Very rarely. It's mostly pure silver, and keeping it clean and dry prevents marks.
Gold vermeil (gold on sterling silver)	No brass base, so it behaves like sterling silver underneath.
Solid gold	High karats rarely. Lower karats contain more copper and can occasionally mark in heat.

The pattern is clear: the green comes from copper, and copper usually arrives in the form of a brass base. If you've got a copper piece you love anyway, our guide to cleaning copper jewellery shows how to keep it under control.

A stainless steel core under the finish, not brass. Featured: Cuban (Silver) 4mm.

Why Does My Chain Turn My Neck Green?

Chains get the worst of it because of where they sit. Your neck and collarbone are warm, they sweat more than your fingers, and they're where aftershave, moisturiser and sun cream go. A chain also moves constantly as you turn your head, so any thin plating is worn by friction all day long.

A few things speed the reaction up:

• Heat and sweat. Summer, the gym and long days out all give copper more of what it needs to react.
• Products on your skin. Aftershave, perfume and lotions can be acidic or contain alcohol, which wears plating and feeds the reaction.
• Chlorine and salt. Pools, spas and seawater are tough on plating and on base metals alike.
• Your own skin. Some people's sweat is naturally more acidic, so the same chain can mark one person and leave another untouched.

Heat and sweat are when cheap chains show their base metal. Featured: Cuban (Gold) 8mm.

How to Get Green Marks Off Your Skin

This is the easy part. Wash the area with warm water and a mild soap, rub gently and dry it properly. Most marks come off straight away; a faint shadow fades within a day.

Skip anything harsh. Scrubbing hard or using alcohol on your skin won't shift it any faster and can leave the area sore. If the mark keeps coming back, the answer is to deal with the jewellery, not your skin.

How to Stop Jewellery Turning Your Skin Green

If a piece is already marking you, you can slow it down, but you can't change what it's made of. These habits help with any jewellery:

• Let your skin products dry first. Put on aftershave, moisturiser and sun cream, wait a few minutes, then put your chain on.
• Remove it before you swim or use a hot tub. Chlorine and salt wear down a finish faster than anything else.
• Leave it in your bag at the gym. Heavy sweat plus friction is exactly what copper reacts to.
• Dry it off. Give it a once-over with a dry cloth once you're back from a hot day, clearing sweat before it can react.
• Store it dry. Somewhere away from bathroom steam keeps every metal in better condition.

Some people paint the inside of a ring with clear nail varnish as a barrier. It works for a while on cheap pieces, but it wears off and needs redoing. The better long-term fix is jewellery that doesn't have a brass base to begin with. For plated pieces, our guides on cleaning gold-plated jewellery and how long a gold-plated finish lasts explain how to look after the finish.

A fine chain sits right on the skin, so the base metal matters most. Featured: Rope (Gold) 2mm.

Green, Black or Red: What the Mark Is Telling You

Not every mark means the same thing, and it's worth knowing the difference.

• Green or blue-green. Copper reacting with sweat. Harmless, and a sign of a copper-based metal.
• Grey or black. Usually tarnish from silver rubbing onto your skin, or dirt trapped in the piece. It's harmless too, and cleaning the jewellery stops it. Our guide to silver tarnish explains why it happens.
• Red, itchy or bumpy skin. That's not a stain but a reaction, most often to nickel. Take the piece off, and if the skin doesn't settle, speak to a pharmacist or GP. Our guide to hypoallergenic metals covers which ones suit sensitive skin.

Made for long, warm days. Featured: Cuban (Silver) 8mm.

Jewellery That Won't Turn Your Skin Green

We built CRAFTD around solving exactly this problem. Our pieces are made so they won't turn your skin green, whether you wear them for a day or every day for years.

• Stainless steel at the core. Our gold chains and silver chains are built on stainless steel rather than brass, then plated with 18K gold or rhodium. There's no copper base waiting underneath, and stainless steel releases very little nickel. They cope with showers and rain; we'd just remove them before swimming or a hot tub, to protect the finish.
• Solid sterling silver. Our sterling silver pieces are 925 silver throughout, with no plated base to wear down.
• Gold vermeil. Our gold vermeil pieces layer 18ct gold onto sterling silver, so there's no brass underneath.

To go deeper on the materials, read how sterling silver compares with stainless steel, what gold plating really means and whether gold tarnishes.

Solid 925 silver, from surface to core. Featured: Cuban (Sterling Silver) 4mm.

18ct gold on a sterling silver base, with no brass underneath. Featured: Cuban (18ct Gold) 3mm | Sterling Silver.

Green Skin FAQs

Why does my necklace leave a green line?

Copper in the chain is reacting with sweat on your skin. It usually means the chain is brass or a copper alloy, or that a thin plating has worn through to a brass base underneath.

Is it bad if jewellery turns your skin green?

No. The mark is harmless and washes off with soap and water. It tells you about the metal, not your health, although that piece will probably keep doing it.

Can solid gold turn your skin green?

High-karat gold rarely does. Lower-karat gold contains more copper and can occasionally leave a faint mark, especially in hot weather. Gold plating over brass is the far more common cause.

Can sterling silver leave a green mark?

Very rarely. Solid sterling silver is mostly pure silver, and any faint mark from heavy sweat wipes away. Keeping the piece clean and dry stops it almost entirely.

Does stainless steel turn your skin green?

No. Stainless steel isn't a copper alloy, so there's nothing in it to leave a green mark. It also releases very little nickel, so it's a sound choice for everyday wear.

How do I get green off my skin?

Wash the area with warm water and a mild soap and dry it properly. Stubborn marks fade within a day. Clean the jewellery too, or the mark will come straight back.

Can I stop cheap jewellery turning my skin green?

You can slow it down by keeping the piece dry and clean and taking it off to wash or exercise, but you can't change what it's made of. Once a brass base shows through, it will keep marking.

What jewellery won't turn my skin green?

Look for stainless steel, solid sterling silver, vermeil (gold on sterling silver) or solid gold. Avoid anything described only as brass, alloy or simply gold-tone.

Wear It Without the Green Line

A green mark is your jewellery telling you what it's made of. Wash it off, and next time choose a piece with no brass base: stainless steel, gold vermeil or solid sterling silver.

Start with our full range of chains, and see what happens when gold plating gets wet before your next holiday.