What’s the difference between jewellery metals?

A simple guide to brass, copper and stainless steel jewellery.

Jewellery is often something we wear every day. It sits on our skin, travels with us, and becomes part of our personal style and memories. But something many people don’t realise is that the metal your jewellery is made from makes a huge difference to how it wears over time.

A lot of jewellery on the market today looks beautiful when you first buy it, but after a few weeks or months it can tarnish, change colour, or even leave marks on your skin. That usually comes down to the metal used.

The most common metals used in affordable jewellery today are brass, copper mixes, and stainless steel. Each behaves very differently, so it’s worth understanding what you’re actually buying.

What Makes Each Jewellery Metal Unique

Brass jewellery

Brass is a mix of copper and zinc. It has a warm golden tone, which is why it’s often used to imitate gold jewellery at a lower price point.

Because it’s inexpensive and easy to work with, many mainstream jewellery brands use brass or brass-based mixes for their pieces.

The downside is that brass reacts with air, moisture, and sweat. Over time it oxidises and tarnishes, often turning darker or developing green tones. This reaction can also transfer onto your skin, leaving green marks, especially in warm weather or when jewellery gets wet.

Copper jewellery - pure vs mixed metals

Copper itself is a natural metal that many people love. Some even believe wearing pure copper has wellness benefits, and it’s been used in jewellery and adornment for centuries.

The important thing to understand, though, is that most jewellery sold today isn’t made from pure copper.

A lot of mass-produced jewellery uses copper mixed with other cheaper metals to reduce cost and make pieces easier to manufacture at scale. These mixes often behave very differently from pure copper.

Because of this, jewellery can oxidise quickly, darken, or leave green marks on the skin. Some mixes can also cause irritation, especially if worn daily or exposed to moisture.

So while copper itself can be beautiful, many pieces on the market today aren’t using pure copper, which is why they don’t always wear well over time.

Stainless steel jewellery

Stainless steel is very different. It’s strong, durable, and made to withstand daily wear, which is why it’s used in things like kitchenware and medical tools.

In jewellery, stainless steel keeps its colour and shine without easily tarnishing or rusting. It’s also generally hypoallergenic, making it a much safer option for people with sensitive skin.

Silver stainless steel will stay the same colour over time, and even gold-plated stainless steel holds up much better than gold plating over brass or copper bases.

This durability is the main reason I choose stainless steel as the foundation for all my jewellery pieces. I want people to be able to wear their jewellery every day without worrying about it changing colour or reacting with their skin.

Why so much jewellery still uses brass and copper mixes

The reality is that brass and copper mixes are widely used because they’re cheaper and easier to produce in large quantities. This makes them popular for fast fashion and trend jewellery.

The problem is that these pieces often don’t last long, meaning they’re replaced quickly and often end up discarded. Jewellery becomes something disposable rather than something you keep and love.

When buying jewellery, it’s worth checking what metal sits underneath the plating. Pieces can look identical in store but wear completely differently over time depending on the base material.

Skin reactions and everyday wear

If you’ve ever taken off a ring or bracelet and noticed a green mark on your skin, that’s the metal reacting with moisture and your skin’s natural oils.

Some people are more sensitive than others, but brass and copper mixes commonly cause irritation or discolouration, especially when worn daily or in humid environments.

Stainless steel is far less reactive, which is why many people find it much more comfortable for everyday jewellery.

Caring for your jewellery

Different metals need different levels of care.

Brass and copper usually need polishing to maintain their shine and to prevent skin staining.

Stainless steel, on the other hand, requires very little maintenance. A gentle clean every now and then keeps it looking good, making it ideal for jewellery you want to wear often.

Choosing jewellery that lasts

There’s nothing wrong with enjoying fashion jewellery, but it’s helpful to know what you’re buying and how it will wear over time.

For me, jewellery should be something you wear again and again, not something that loses its shine after one season. That’s why material choice matters so much in my own designs.

Using stainless steel means pieces stay beautiful longer, feel comfortable on the skin, and become part of your everyday life rather than something you replace.

When choosing jewellery, it’s always worth asking what sits underneath the finish. Understanding the materials helps you buy pieces you’ll actually keep and love.