TL;DR

Jewellery tarnishes when the metal reacts with sulfur, oxygen, sweat, perfume, lotion, or chlorine in the air or on your skin. Sterling silver tarnishes the fastest because the copper in the alloy oxidizes. 14K gold can dull slightly. Pure 18K and 22K gold barely tarnish at all. Plated pieces (gold-filled, vermeil, gold-plated) look perfect for a while, then wear through — that is normal, not a defect. You can slow tarnish dramatically with dry storage, anti-tarnish strips, and by taking jewellery off before showers, pools, and gym sessions. White gold rings need professional rhodium re-plating every 12–24 months at Bijouterie Jamil in Montréal, typically $60–$120 CAD per ring.

Table of contents

1. What tarnish actually is
2. Why silver tarnishes the fastest
3. How gold karats change the equation
4. Plated jewellery: gold-filled, vermeil, gold-plated
5. White gold and rhodium: the wear-off you should expect
6. The real culprits: sweat, perfume, chlorine, lotion
7. How to slow tarnish at home
8. When to bring it in for professional service
9. FAQ

What tarnish actually is

Tarnish is a chemical reaction between metal and something in its environment — most often sulfur compounds in the air, oxygen, or moisture. The metal does not "go bad". A thin layer on the surface oxidizes and changes colour. On silver, that layer turns yellow, then brown, then black. On gold alloys, it shows up as a dull haze or a faint greyish film.

The key word is alloy. Almost no jewellery is made from a single pure metal — it would be too soft to wear. Jewellers mix the precious metal (gold, silver, platinum) with copper, zinc, nickel, palladium, or silver to give the piece structure. Tarnish happens to those mixed-in metals, not to the gold or silver itself. That is why higher-purity pieces tarnish less: there is less of the reactive stuff in the alloy.

If you understand that one idea — tarnish is the alloy reacting, not the precious metal — everything else in this article makes sense.

Why silver tarnishes the fastest

Sterling silver is 92.5% silver and 7.5% copper. That copper is the troublemaker. Copper reacts with sulfur in the air (hydrogen sulfide is everywhere — it comes from cooking, traffic, even from your own skin) and forms copper sulfide on the surface. That is the dark layer you see.

In Montréal, we notice silver tarnishes faster in summer when humidity is high and people sweat more. We also see it speed up in homes near gas stoves and in apartments above dry cleaners. None of this is a defect in your piece. Sterling silver has been doing this for 4,000 years.

Pure silver (.999 fine) tarnishes much more slowly because there is almost no copper in it, but it is also too soft for rings or bracelets you wear daily. That is the tradeoff — purity versus durability. We talk through the same logic for gold in our gold karats explained guide, and again for white gold versus platinum versus silver.

How gold karats change the equation

Gold itself does not tarnish. It is one of the least reactive metals on earth — that is why archaeologists find Egyptian gold pieces still glittering after 3,000 years. What tarnishes is everything you mix it with.

Here is what to expect, karat by karat:

• 10K gold (41.7% pure): the most reactive of the common gold alloys. Almost 60% of the metal is copper, silver, and zinc. You may see slight dulling after a year or two, especially on chains worn against the skin. Easy to polish back.
• 14K gold (58.5% pure): the Quebec everyday standard. Tarnishes very mildly — usually just needs a polishing cloth every few months. Some people with acidic skin chemistry see faint discolouration sooner.
• 18K gold (75% pure): barely tarnishes. Most 18K pieces just need a wipe to look new. This is the karat we use for the majority of fine engagement rings at Bijouterie Jamil.
• 22K gold (91.7% pure): essentially tarnish-proof. The colour stays the same for decades. The downside is softness — 22K dents and scratches more easily, so it is best for earrings, pendants, and ceremonial pieces, not daily-wear rings.
• 24K gold (99.9% pure): does not tarnish at all. Also too soft for almost any wearable jewellery.

If you have ever wondered why your grandmother's 18K wedding band still looks the same and your costume jewellery turned black in a drawer — that is the karat math at work.

Plated jewellery: gold-filled, vermeil, gold-plated

Plated pieces look like solid gold but are not. There is a base metal (usually brass, copper, or sterling silver) underneath a thin layer of gold. The plating wears through eventually. This is normal physics, not a defect, and no jeweller can prevent it forever.

Here is the realistic lifespan, ranked from longest to shortest:

• Gold-filled (1/20 or 1/10 by weight): the thickest plating. A high-quality gold-filled chain can last 10–30 years if you care for it. The gold layer is mechanically bonded under heat and pressure, not just deposited.
• Vermeil (sterling silver base, minimum 2.5 microns of 10K+ gold): a real category, regulated in Canada. Lasts 2–10 years depending on wear. The silver base will tarnish if the plating wears through.
• Gold-plated / electroplated (typically under 1 micron): the thinnest. Usually lasts 6 months to 2 years on a ring, longer on earrings and pendants that don't rub against skin and clothing. Costume pieces from fast-fashion brands often plate under 0.25 microns and wear off in weeks.

If a piece is "tarnishing" by turning green or pink underneath, it is not really tarnishing — the plating has worn through and you are seeing the base metal. We can sometimes re-plate these at Bijouterie Jamil, but it depends on the base. Sterling silver bases re-plate well; pot metal and zinc alloys do not.

White gold and rhodium: the wear-off you should expect

This is the question we answer most at the bench: "Why is my white gold ring turning yellow?"

It is not turning yellow. It always was yellowish — you are just seeing the gold underneath the rhodium.

White gold is a yellow gold alloy mixed with white metals (palladium, nickel, silver) to lighten the colour. The result is still slightly warm — a soft champagne tone, not a true bright white. To get the bright white look people associate with white gold, jewellers electroplate the piece with a thin layer of rhodium, a platinum-group metal. Rhodium is brilliant white, very hard, and hypoallergenic.

But rhodium is a plating, and platings wear. On a wedding band you wear every day, the rhodium typically wears through on the high-contact areas (the inside of the band, the top of a ring shoulder) within 12–24 months. You will see a faint yellow shadow first, then a clear two-tone effect. This is universal — every white gold ring on earth does this.

The fix is professional rhodium re-plating. At Bijouterie Jamil, we strip the surface, polish, and re-plate. Typical cost is $60–$120 CAD per ring depending on size, stones, and prep work. Lead time is usually 3–5 business days. A ring with multiple stones or detailed engraving costs slightly more because we take longer protecting the stones. We cover the full process in our jewellery repair services guide.

If you do not want to re-plate every couple of years, the alternative is platinum, which is naturally white all the way through and never needs plating. Platinum costs more upfront but you skip the maintenance cycle. We explain the full tradeoff in white gold versus platinum versus silver.

The real culprits: sweat, perfume, chlorine, lotion

Most tarnish is preventable. The people who never have tarnish problems are the people who keep their jewellery away from a short list of things.

Sweat. Salty sweat is mildly acidic and contains chlorides that attack copper in alloys. People with acidic skin chemistry tarnish silver chains in days. If you sweat heavily — gym, hot yoga, long walks in July — take chains and rings off first.

Perfume, cologne, hairspray. Spray these on before you put jewellery on, and let them dry. Alcohol-based fragrances strip polish and react with silver almost instantly. We see chains come into the shop with a clear "perfume burn" line where the fragrance hits.

Lotion, sunscreen, makeup. These coat the surface, trap dirt, and dull shine. Sunscreen with zinc oxide is especially hard on silver. Apply skincare first, let it absorb, then put jewellery on.

Chlorine and salt water. Pool chlorine is brutal on every alloy except platinum. It attacks the copper, nickel, and zinc in gold alloys and can cause tiny stress cracks at solder joints over years. Salt water is gentler but still corrosive. Take rings and chains off before pools, hot tubs, and the beach.

Showers and dish soap. Hot water plus soap is not catastrophic, but it speeds up tarnish on silver and dulls plating. The biggest risk in the shower is actually dropping the ring down the drain.

Cleaning products. Bleach, ammonia, and oven cleaner can permanently damage gold alloys. Take rings off before scrubbing the kitchen.

How to slow tarnish at home

You do not need expensive products. Here is what we tell every customer who walks into the Montréal store with a tarnished piece.

1. Store jewellery dry, sealed, and separated. Air and humidity are the enemies. Use small zip-lock bags (one piece per bag) or anti-tarnish pouches. Toss a few anti-tarnish strips (sold at jewellers, hardware stores, and online for $5–$15 CAD per pack) into your jewellery box. They absorb sulfur and last about 6 months.

2. Wipe pieces after wearing. A soft cotton or microfibre cloth removes sweat, lotion, and surface dirt before they react. Thirty seconds per piece.

3. Use a polishing cloth weekly for silver. Impregnated silver polishing cloths are inexpensive ($10–$20 CAD) and remove light tarnish in seconds. Do not use them on plated pieces — you will rub the plating off.

4. Skip the toothpaste hack. Toothpaste is abrasive and scratches softer metals. Stick to a polishing cloth or a proper jewellery cleaner.

5. Last on, first off. This is the rule we repeat every single day: put your jewellery on after lotion, perfume, and getting dressed. Take it off first when you come home, before showering or sleeping.

We cover the full at-home cleaning routine in how to clean fine jewellery at home.

When to bring it in for professional service

Some things are beyond a polishing cloth. Bring a piece to a jeweller when:

• A white gold ring is showing yellow on the high points → time for rhodium re-plating ($60–$120 CAD)
• A chain or ring has black tarnish in detailed crevices a cloth cannot reach → professional ultrasonic and steam cleaning ($20–$50 CAD)
• A plated piece has worn through and you want it refreshed → re-plating quote required, depends on base metal
• A stone setting feels loose or you see scratches deep enough to catch a fingernail → repair, not just cleaning
• Tarnish keeps coming back fast on a ring you barely take off → we will check the alloy stamp and look for wear patterns that point to skin chemistry or storage issues

In Montréal, drop-in evaluations at Bijouterie Jamil are free. We give you a written quote before any work begins, and most cleaning and re-plating jobs are back in your hands within a week.

FAQ

Does real gold tarnish?

Pure gold (24K) does not tarnish at all. Gold alloys (10K, 14K, 18K, 22K) tarnish to a small degree because of the other metals mixed in — copper, silver, zinc, nickel. Higher karat means less tarnish. 18K and 22K gold are essentially tarnish-resistant in normal wear.

Why is my white gold ring turning yellow?

It is not turning yellow — the rhodium plating on top has worn through and you are seeing the natural slightly-warm colour of the white gold alloy underneath. This is normal and happens to every white gold ring within 12–24 months of daily wear. The fix is professional rhodium re-plating, typically $60–$120 CAD at Bijouterie Jamil in Montréal.

Can I shower with my jewellery on?

You can, but you should not make a habit of it. Hot water, soap, and shampoo speed up tarnish on silver and dull plating on gold-plated and vermeil pieces. Solid 14K and 18K gold tolerate showers, but the bigger risk is dropping a ring down the drain. Take rings off before showering whenever you can.

Can I swim with gold or silver jewellery?

No, especially not in chlorinated pools or hot tubs. Chlorine attacks the copper, nickel, and zinc in gold alloys and can cause tiny stress fractures at solder joints over time. Salt water is gentler but still corrosive. Platinum is the only common fine-jewellery metal that is fully chlorine-safe.

How often does white gold need to be rhodium re-plated?

For a wedding band or engagement ring worn every day, every 12–24 months. Earrings and pendants that get less friction can go 3–5 years. We charge $60–$120 CAD per ring for rhodium re-plating at Bijouterie Jamil, with a 3–5 business day turnaround.

What is the difference between gold-filled, vermeil, and gold-plated?

Gold-filled has the thickest gold layer (mechanically bonded, 1/20 or 1/10 of the total weight in gold) and lasts 10–30 years. Vermeil is a sterling silver base with at least 2.5 microns of 10K+ gold, lasting 2–10 years. Gold-plated is the thinnest — under 1 micron — and typically wears off in 6 months to 2 years on rings. Only vermeil is regulated by name in Canada.

How do anti-tarnish strips actually work?

They are small paper strips treated with activated carbon and a sulfur scavenger that absorbs the airborne sulfur compounds responsible for tarnish on silver. Drop one in your jewellery box or bag. They last about 6 months and cost $5–$15 CAD per pack.

Will polishing my ring remove material?

A soft polishing cloth removes only the tarnish layer and is safe to use as often as you want on solid gold and silver. Professional machine polishing removes a tiny amount of metal — micrometres — which is why we recommend it sparingly on engraved pieces and antique jewellery. Plated pieces should never be machine polished because it strips the plating.

Visit us in Montréal

If your white gold ring is showing yellow, your silver chain has gone dark, or you are not sure whether a piece can be saved — bring it to Bijouterie Jamil. Drop-in evaluations are free, and we will give you a written quote before any cleaning, polishing, or rhodium re-plating begins. Most jobs are back in your hands within five business days.

About the author Nader Khazzoum is a master jeweller at Bijouterie Jamil in Montréal, specialized in custom fabrication, stone setting, laser welding, and rhodium plating. He has restored thousands of family pieces from tarnished silver chains to 50-year-old white gold wedding bands.