Does Brass Turn Your Skin Green? Why It Happens and How to Stop It

Why does brass turn skin green?

Brass turns skin green because its main ingredient, copper, oxidizes when it meets sweat, oils and moisture, forming green copper compounds that transfer to your skin. The same process gives old copper roofs and coins their green coating, usually called verdigris. Zinc, the other main ingredient in brass, is not the cause.

The reaction is faster with humid weather, sweat, salty skin, lotion, soap and sunscreen sitting under the piece, and it shows first on rings and earring posts because they stay in contact with the skin all day. Skin chemistry differs from person to person, which is why one friend is stained and another is not.

What metals turn your skin green?

The metals that turn skin green are the ones with copper in them: pure copper, brass, bronze and any base metal alloy that is mostly copper. Here is how common jewelry metals compare:

Stones are separate: cubic zirconia does not turn green, the metal around it does, which we explain in does cubic zirconia turn green. The wider picture is in why jewelry turns skin green and why a ring turns a finger green.

Does solid brass turn green too?

Yes, solid brass can turn skin green, because the reaction comes from the copper in the alloy, not from a cheap coating. Higher quality brass is not exempt, although how much and how fast it marks depends on the exact alloy and your skin. If you also want the cleaning side, see how to clean brass jewelry.

Does plated brass turn skin green?

Gold plated or silver plated brass usually does not mark your skin at first, then often does once the plating wears through. The plating is a thin coating, and the first places it wears are the high contact spots: the inside of a ring band, the back of an earring post, a bracelet clasp. When brass shows there, the green begins. We compare the underlying metals in brass vs gold plated and copper vs brass jewelry, and the plating side in does gold plated jewelry turn skin green.

Plating over brass, steel or sterling: what happens when it wears

Always check what the base is. A bare "gold plated" label does not say.

What does brass look like on skin, and how fast does it happen?

Brass on skin typically leaves a faint green, grey green or dark smudge under a ring or around an earring, and the metal itself may look duller. Timing varies: with sweaty hands in warm weather it can show within hours, while for others it takes weeks or never happens. A piece that stains in summer may behave in winter because moisture and sweat drive the reaction.

A quick self test for an unknown piece: wear it for a full day in normal conditions, then wipe the contact area with a white tissue. A green or dark mark on the tissue or skin suggests a copper rich metal or worn plating. This is a rough check, not a lab result.

Worked example: two rings, same price

Ring one is "gold tone, plated" with no base named. Ring two is plated over stainless steel and says so. After a few months of daily wear, the plating on both thins at the inside of the band. On ring one that exposes whatever is underneath, which in cheap pieces is often brass. On ring two it exposes steel, which looks different but does not leave copper green. The price at the till was the same; what differs is the base you cannot see.

What to do if your jewelry already turned your skin green

1. Wash the area with mild soap and water; the mark should lift.
2. Stop wearing that piece against skin until you know the base.
3. Clean the jewelry itself with a soft cloth (brass care is in the cleaning guide linked above).
4. Decide whether to coat the inside of a ring or swap to a different base.

How to stop jewelry turning your skin green

1. Change the base metal. This is the only fix that lasts. Choose steel, titanium or sterling silver bases.
2. Keep it dry. Remove rings before washing hands, exercising and swimming.
3. Apply lotion and sunscreen first, let them absorb, then put jewelry on.
4. Use a barrier on the inside of a ring. A thin coat of clear nail polish is a common stopgap. It wears off and needs reapplying, and it does not stop the metal reacting.
5. Wipe it after wearing to remove sweat and oils.
6. Replace pieces whose plating has worn through, since exposed brass will keep marking.

If a ring already left a green mark, soap and water usually removes it from skin. This is general information, not medical advice. A rash, itching or swelling can have another cause, so ask a doctor.

Is the green mark an allergy or harmful?

A green mark is usually a cosmetic stain, not an allergic reaction. Redness, itching or a rash is different and may point to a reaction to a metal such as nickel, which some alloys contain. Because brass alloys vary, we cannot say what is in a given piece. General information only: see a doctor if you have a rash that does not clear.

An honest note on our range

We do not sell brass jewelry. Our pieces are plated over 925 sterling silver or 316L stainless steel, so the copper green that brass is known for is not what we expect, although plating still wears and sterling silver can darken. Stainless steel is considered hypoallergenic for most wearers, but it is not nickel free, so check with a doctor if you have a diagnosed nickel allergy.

• Thin silver huggie earrings, polished 925 sterling silver with no plating, $26.99.
• Gold drop huggie hoops, 18K gold plated over 316L stainless steel, $28.99.
• Silver drop huggie hoop, rhodium plated over 316L stainless steel, $28.99.

Looking for more options? See what jewelry does not tarnish or browse hypoallergenic earrings. US orders ship free and returns are free for 30 days.

To check a base metal with a magnet, see is brass or copper jewelry magnetic.

Frequently Asked Questions

Will brass turn your skin green?

It often will, because the copper in brass reacts with sweat and moisture. It varies by person, alloy and weather, and the green washes off.

Do brass rings turn your finger green?

Yes, rings are the most common case, since they sit against skin all day with soap, lotion and sweat trapped underneath. A clear coat on the inside of the band can slow it down for a while.

Will brass earrings turn my ears green?

They can, mainly at the post or hook where the metal touches the piercing. Earrings with a sterling silver, stainless steel or titanium post avoid the copper reaction.

What metal turns green?

Metals with a lot of copper: copper itself, brass and bronze. Gold or silver plating over those metals turns green once the plating wears through.

Does fake silver turn green?

It can when the base under a silver coloured finish is copper based. Check the base metal, not just the colour.

Does brass tarnish?

Yes, brass darkens and dulls over time as it oxidizes. See how to clean brass for what helps.

Does silver plated brass turn your skin green?

It can, once the silver layer wears down and the brass reaches your skin. The thinner the plating, the sooner that happens.

Is the green stain on skin harmful?

It is generally a harmless cosmetic mark. General information only: if you get redness, itching or a rash, ask a doctor.

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