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Sterling silver can turn your finger green, and the cause is not the silver. It is the copper in the alloy reacting with your sweat, it happens to some people and not others, and it says nothing about whether the piece is genuine. Rhodium or gold plating blocks the reaction for as long as the plating stays intact.
Sterling silver is 92.5% silver and 7.5% copper by weight, and it is the copper that reacts, not the silver. Pure silver is close to inert against skin and sweat, but it is also too soft to hold a ring's shape or grip a stone securely, so jewellers have alloyed it with copper for strength since long before anyone was worried about green fingers.
Why does sterling silver turn skin green?
Sweat carries sodium chloride, lactic acid and trace amino acids, and all three attack copper. The copper at the surface of the metal first oxidises, then reacts further with those compounds to form copper carbonate, copper chloride and copper sulfate — a family of blue-green salts related to the verdigris that forms on outdoor bronze and copper roofing over years of weather.
Those salts do not stay on the metal. They transfer to skin as a fine green residue wherever the piece sits, which is why the mark tends to appear under a ring band rather than around it, or under a bracelet clasp rather than along the whole chain.
This is a chemical reaction between metal and sweat, not an allergic reaction, and it washes off with soap and water. It leaves no lasting mark on the skin itself.
Does a green mark mean my ring is fake or poor quality?
A green mark does not mean the piece is fake, though it does not prove it either — it only rules out pure fine silver. Sterling silver is defined by its copper content — 92.5% silver and 7.5% copper is what the 925 stamp refers to — so a reaction involving copper is consistent with the metal being genuine sterling. It does not prove authenticity on its own, because plated base-metal jewellery that also contains copper can react the same way. What it does rule out is pure fine silver, which does not carry enough copper to react like this at all.
Whether any individual sees a visible mark depends far more on personal skin chemistry than on the ring. Skin surface pH varies from person to person, commonly reported in the roughly 4.5 to 6.5 range, and more acidic skin drives the copper reaction faster and more visibly. Sweat volume and composition shift with heat, exercise, hormones, medication and diet, and humid or coastal climates tend to make it worse because there is more moisture sitting against the metal for longer.
Does rhodium or gold plating stop it?
Rhodium and gold plating block the reaction for as long as the plating stays intact, and with regular wear it typically wears through within six months to a year. Both platings sit as a thin metallic layer over the sterling silver base and physically separate your skin from the copper underneath, so there is nothing for sweat to react with. Our eternity band is finished in rhodium plating and our marquise-cut ring in gold plating, both over 925 sterling silver, and both work the same way: the plating is the barrier, not the silver underneath it.
Plating is not permanent. It wears thinnest wherever a piece takes the most friction — the underside of a ring shank against a desk or a steering wheel, the clasp of a tennis bracelet against a wrist, the back of a cuban link bracelet where it sits heaviest. Once it thins through, the sterling silver underneath is exposed again and the same reaction becomes possible. A jeweller can renew the plating; that is routine maintenance, not a sign anything went wrong.
Is a green mark an allergic reaction?
No, and the distinction matters if you are trying to work out what you are dealing with. A metal allergy is usually to nickel, involves the immune system, and shows up as itching, redness or a rash that can persist after the jewellery comes off. Nickel is not part of the standard 925 sterling silver specification, which is silver and copper, though it can appear in cheaper base-metal jewellery underneath a silver or gold finish. The green residue described here is a surface stain rather than a rash, and it comes off with washing rather than lingering on the skin.
Which metals actually do this?
| Metal | Contains copper | Can turn skin green | Note |
|---|---|---|---|
| Fine silver (999) | No | No | Too soft for most jewellery settings on its own |
| Sterling silver (925), unplated | Yes, 7.5% | Yes, on reactive skin | The industry standard for workable silver jewellery |
| Rhodium or gold plated sterling silver | Yes, beneath the plating | No while plating is intact | Reaction can return once plating wears through |
| Stainless steel | No, standard alloys | No | Common choice for pieces worn in water |
| Titanium | No | No | Corrosion-resistant, used in some rings and bands |
How do you deal with it, or avoid it?
Keep a piece dry when you reasonably can, since trapped moisture under a ring or a bracelet clasp is what drives the reaction fastest. Wipe pieces down after a workout, take rings off before applying lotion or perfume, and clean stone-set pieces like stud earrings or a floating solitaire necklace with a soft cloth so residue does not sit against skin overnight. None of this is about the jewellery being fragile; it is the same handling that applies to any copper-bearing metal.
If a piece reacts on you consistently and you want to rule the problem out entirely rather than manage it, stainless steel and titanium do not contain copper in their standard alloys and will not produce this reaction at all. Our stainless steel bracelet set and titanium stacking ring are built on those bases rather than sterling silver, specifically because some people want a piece they never have to think about this way.
Should this change which ring you choose?
Not on its own. Both platings block the reaction while they are intact, and most people wearing either ring day to day will not notice anything at all — this is a minority effect that depends on individual skin chemistry, not a certainty that comes with the material. If you already know you react to copper-alloy jewellery, treat the plating's lifespan as the thing to plan around rather than avoiding sterling silver altogether. We cover the broader case for and against a moissanite ring, including the questions worth asking before you commit to one, in is moissanite worth it for an engagement ring.
Our 925 sterling silver pieces
Every piece below is 925 sterling silver under its plating, and every listing states the plating used.
- Moissanite eternity bandrhodium-plated, in three stone sizes
Marquise-cut moissanite ringgold-plated, nine sizes stocked
Moissanite tennis braceletrhodium-plated, three widths
Moissanite stud earringsless skin contact than a ring, several sizes
Floating solitaire necklacerhodium or gold-plated
Moissanite cross pendantgold or rhodium tone
Moissanite Miami cuban link braceletwhite-gold plated, two widths
Sterling silver moissanite crosssilver or gold tone, two chain lengths
You can browse the full range by category — rings, earrings, bracelets and necklaces — or start with our best sellers, which is where most people begin.
Common questions
Will sterling silver turn my finger green?
Sometimes. It depends on your skin chemistry, not on whether the piece is genuine. Sterling silver is 92.5% silver and 7.5% copper, and the copper reacts with sweat to form a green residue on some people and not others.
Does a green mark mean my jewellery is fake?
No. It is consistent with the copper content of real sterling silver. It does not prove authenticity either way, since copper-bearing base-metal jewellery can react the same way, but it rules out pure fine silver, which contains too little copper to react like this.
Does rhodium or gold plating stop sterling silver from turning skin green?
Yes, while the plating is intact, because it physically separates your skin from the copper underneath. Plating wears thin with regular contact, typically within six months to a year, and the reaction can return once it does.
Is a green mark from silver jewellery an allergic reaction?
No. It is a chemical reaction between copper and sweat, not an immune response. A nickel allergy is different: it involves the immune system and causes itching or a rash rather than a surface stain that washes off.
Do stainless steel or titanium jewellery avoid this problem?
Yes. Neither metal contains copper in its standard alloy, so neither produces this reaction, which is why they are common choices for pieces meant for constant water or skin contact.
More questions
We answer shipping, returns, sizing and payment questions on our FAQ page. If something is not covered there, get in touch and a person from the workshop will answer.
References
The alloy figures in this article follow the standard 925 sterling silver specification: 92.5% silver, 7.5% copper by weight. The reaction chemistry — copper forming carbonate, chloride and sulfate salts on contact with sweat — and the role of skin surface pH, sweat composition and plating wear are drawn from published materials-science and dermatological sources rather than jewellery marketing copy, and were cross-checked across independent references rather than taken from a single source. Reported skin pH ranges and rhodium plating lifespans vary by individual and by wear pattern; the figures given here reflect the ranges commonly reported across those sources, not a guarantee for any one piece or person.
