Why Does Silver Tarnish? The Truth About Sterling Silver, Gold and Body Chemistry
5 minute read
One of the questions I'm asked most often as a jeweller is:
"Why has my silver necklace turned black?"
Sometimes people worry they've bought poor-quality jewellery. Others think they've done something wrong.
The truth is much simpler.
Tarnishing is completely normal.
In fact, it's a sign that you're wearing genuine sterling silver.
Recently I was looking at my husband's necklace, one that I made for him. He wears it every day, and within a few weeks it develops a dark patina. If I wore exactly the same necklace, it would stay bright for much longer.
Nothing is wrong with the necklace.
The difference is us.
Our bodies are all different, and that's one of the biggest reasons silver behaves differently from one person to another.
What is silver tarnish?
Sterling silver doesn't rust.
Instead, it reacts with sulphur compounds in the air, forming a very thin layer called silver sulphide on the surface.
This is what gives silver its darker appearance.
Unlike rust, tarnish only affects the surface of the metal. It doesn't damage solid sterling silver, and in most cases it can be removed easily with the right cleaning.
Think of it as silver's natural way of reacting with the world around it.
Why does silver tarnish on some people but not others?
This is probably the question I hear most.
Two people can wear exactly the same sterling silver necklace every day and have completely different experiences.
One person's necklace may stay bright for months.
Another person's may darken within a few weeks.
That doesn't mean one necklace is better than the other.
It simply means the person wearing it has different body chemistry.
Factors that can affect how quickly sterling silver tarnishes include:
- your natural skin chemistry
- sweat composition
- skin pH
- naturally occurring salts and sulphur compounds
- hormones
- some medications
- humidity
- sea air
- perfumes
- moisturisers and sunscreen
- household cleaning products
- chlorine in swimming pools and hot tubs
Often it's a combination of several of these rather than one single cause.
A real-life example: Why my husband's silver necklace tarnishes so quickly
He doesn't use lots of skincare products, and he isn't particularly hard on his jewellery. Yet his sterling silver necklace develops a dark patina much faster than mine ever would.
It's simply how his body chemistry reacts with silver.
One thing you'll probably notice in these photos is that the tarnish isn't perfectly even. Some areas have darkened much more than others. That's completely normal. Different parts of the necklace are exposed to different amounts of air, movement and contact with the skin, so silver rarely tarnishes in exactly the same way across the whole piece.
I've seen exactly the same thing with many clients over the years.
Some rarely need to polish their jewellery.
Others need to do it every few weeks.
Neither is right or wrong.
It's simply one of the fascinating characteristics of sterling silver.
The same sterling silver necklace after a quick clean. Tarnish may look dramatic, but because it's a surface reaction it can usually be removed without damaging the silver.
Does wearing silver every day make it tarnish faster?
Surprisingly, not always.
In many cases, wearing silver regularly can actually help keep it brighter because the natural movement against your skin and clothing gently polishes the surface.
However, if your body chemistry causes silver to tarnish quickly, daily wear may have the opposite effect.
This is why there isn't one simple answer that applies to everyone.
Can solid gold tarnish?
Yes—but not in the same way as sterling silver.
Pure gold is one of the least reactive metals, which is why it has been treasured for thousands of years.
However, jewellery isn't made from pure gold alone.
Both 9ct and 18ct gold contain other metals to make them strong enough for everyday wear.
Because of this, solid gold can occasionally develop slight surface discolouration or become dull over time, particularly depending on body chemistry, cosmetics and everyday exposure.
Unlike sterling silver, though, it doesn't usually develop the dark surface tarnish that silver is known for.
In most cases, a gentle clean or professional polish quickly restores its shine.
Does living by the sea make jewellery tarnish?
People often ask me this because I live and work in Cornwall.
Sea air itself isn't the main culprit, but the higher humidity and salt in coastal environments can speed up tarnishing.
That doesn't mean you shouldn't wear your jewellery by the sea.
It simply means it may benefit from cleaning a little more often.
How can I slow down tarnishing?
You can't completely stop sterling silver from tarnishing, but you can slow the process down.
Here are a few simple habits that help:
- Wipe your jewellery with a soft cloth after wearing it.
- Store it somewhere dry rather than in a humid bathroom.
- Keep pieces separate to avoid scratches.
- Remove jewellery before using household cleaning products.
- Rinse and dry jewellery after swimming in chlorinated pools or hot tubs.
- Clean tarnish before it becomes heavy.
If you'd like more tips on cleaning, storing and looking after your jewellery, I've put together a full Jewellery Care Guide covering sterling silver, gold, gemstones and sea glass.
How should I clean tarnished silver?
For light tarnish, a good-quality silver polishing cloth is usually all that's needed.
For heavier tarnish, use a silver cleaner designed specifically for sterling silver and always follow the manufacturer's instructions.
Avoid harsh abrasives, as they can scratch the surface and gradually remove fine details.
If your jewellery contains gemstones, pearls or delicate finishes, check that your cleaning method is suitable before using any products.
If you're ever unsure, ask the jeweller who made your piece.
Common myths about silver tarnish
"Good silver shouldn't tarnish."
False.
In fact, genuine sterling silver naturally tarnishes.
"If it turns black, it must be fake."
False.
Sterling silver develops tarnish naturally. Poor-quality metals often behave very differently.
"I've done something wrong."
Not at all.
Most tarnishing comes down to normal wear, the environment and your individual body chemistry.
Frequently Asked Questions
Why is my silver necklace turning black?
Because sterling silver naturally reacts with sulphur compounds in the air and with your environment. This creates a dark surface layer called tarnish, which can usually be cleaned away.
Why does my silver jewellery tarnish faster than someone else's?
Everyone's body chemistry is different. Skin pH, sweat composition, hormones, medications, humidity and skincare products can all influence how quickly silver tarnishes.
Can tarnish damage sterling silver?
No. Tarnish is a surface reaction. It doesn't permanently damage solid sterling silver and can usually be removed.
Can 9ct gold tarnish?
Solid 9ct gold can occasionally become dull or develop slight surface discolouration because it contains alloy metals, but it behaves very differently from sterling silver and doesn't usually develop the same dark tarnish.
Can you shower wearing sterling silver?
Yes, you can, but I generally don't recommend making it a habit. Soap residue, shampoos and hard water can dull the finish over time, and if your body chemistry already causes silver to tarnish quickly, constant exposure to moisture may speed up the process. It's always best to remove your jewellery before showering if possible.
Can perfume make silver tarnish?
Yes. Perfumes, moisturisers, sunscreen and hairspray can all contribute to tarnishing or leave a residue on the surface of your jewellery. It's always best to apply cosmetics first, allow them to dry, and then put your jewellery on.
Should I stop wearing my silver jewellery?
Quite the opposite.
Jewellery is made to be worn. Regular cleaning and sensible care are usually all that's needed to keep it looking beautiful.
Final thoughts
That's one of the things I love most about precious metals. They aren't static. They respond to the person wearing them, the places they go and the life they become part of. Every piece tells its own story.
So if your sterling silver necklace has become darker over time, don't panic.
It doesn't mean it's poor quality, and it certainly doesn't mean you've damaged it.
It simply means your jewellery is being worn, loved and lived in.
With a little care and the occasional polish, sterling silver will continue to shine beautifully for many years to come.
