“How much is a platinum wedding ring worth?” is really two questions wearing one coat. It can mean “what should I expect to pay for one?” or “if I sold mine tomorrow, what would I get?” The answers are very different, and it is worth being clear about both before you spend anything.

This guide covers what platinum wedding rings cost in the UK, why platinum sits above gold, and what the resale reality actually looks like.

What you will pay: the short version

A plain platinum wedding band in the UK usually costs between £450 and £2,200. Narrow and simple sits at the bottom. Wide and heavy sits at the top. Add diamonds and you move up from there.

As a rough rule, the same ring in platinum costs around 1.5 to 2 times what it costs in 18ct gold. Not because platinum is a rarer metal on the day you buy it, but for three specific reasons that are worth understanding.

Why platinum costs more than gold

1. Platinum is heavier, so you need more of it

This is the reason most people never hear, and it is the biggest one.

Platinum is a dense metal. A cubic centimetre of it weighs about 21.4 grams. The same volume of 18ct gold weighs about 15.5 grams. Jewellery is sold by weight, but a ring is made to a shape and a size, not to a weight.

So when a jeweller makes an identical ring in both metals, the platinum version simply contains more grams. Typically around 35% to 40% more. Even if the two metals cost the same per gram, the platinum ring costs more, because there is more of it.

2. Platinum rings are almost pure

UK platinum jewellery is normally 950 platinum, meaning 95% pure platinum. Compare that to 18ct gold at 75% gold, or 9ct at 37.5%.

You are buying a much higher proportion of precious metal. A 950 platinum band is close to solid platinum all the way through, which is also why it never needs plating and never changes colour.

3. It is harder and slower to work with

Platinum melts at around 1,768°C. Gold melts at around 1,064°C. That gap matters in a workshop. Platinum needs different tools, different torches, higher temperatures and separate benches, because even a trace of gold contamination ruins a platinum job.

It is also tougher to cut and polish, so it takes a skilled maker longer. And offcuts cannot simply be tipped into the gold scrap pot; they have to be kept and refined separately. All of that lands in the price.

What about the metal price itself?

Here is the honest part. Platinum and gold trade on open markets and their prices move independently. There have been long stretches where platinum traded below gold per gram, and stretches where it traded well above.

So “platinum costs more because it is more expensive metal” is not reliably true. “Platinum rings cost more because they contain more metal, at higher purity, worked at greater cost” is true regardless of what the markets did this week.

Platinum versus gold: side by side

	950 Platinum	18ct White Gold	18ct Yellow Gold
Precious metal content	95%	75%	75%
Density (g/cm³)	21.4	about 15.5	about 15.5
Weight of the same ring	Heaviest	Lighter	Lighter
Needs re-plating?	No	Yes, every 1–3 years	No
Colour over time	Stays white, softens to a satin patina	Warms up as plating wears	Stays yellow
How it wears	Metal moves aside rather than wearing away	Metal is gradually lost	Metal is gradually lost
Typical plain 4mm band	£800 – £1,300	£600 – £980	£600 – £980

That line about metal moving aside deserves a sentence of its own. When platinum is scratched, the metal is pushed to the side rather than removed, forming a soft satin surface jewellers call a patina. Nothing is lost. A polish brings back the shine whenever you want it. Gold that is scratched genuinely loses tiny amounts of metal each time.

This is why platinum is often recommended for the part of a ring that grips a diamond. The little claws holding the stone keep their grip for longer.

Realistic UK platinum price guide

Style	Typical UK price
Plain 2mm slim band	£450 – £700
Plain 3mm band	£600 – £950
Plain 4mm band	£800 – £1,300
Plain 6mm heavy band	£1,400 – £2,200
Diamond-set band, lab-grown stones	£700 – £1,800
Solitaire ring, lab-grown centre stone	£650 – £2,500

Prices move with the metal markets, so check on the day. But the shape of the table stays the same: width and weight matter more than anything else.

For a sense of what that buys, our Solitaire Round Cut Engagement Ring in Platinum is £657 with a certified lab-grown centre stone, and the Bezel Cushion Cut Engagement Ring in Platinum is £904. A bezel setting wraps a rim of platinum right around the stone, which uses more metal and more bench time than claws, and the price reflects that.

The other question: what is it worth if you sell it?

This is where expectations need managing.

If you sell a platinum ring to a scrap buyer or a pawnbroker, you are paid for the metal by weight, at a percentage of the market price, minus refining costs. You are not paid for the design, the making, the hallmark or the setting work. Realistically that is often 40% to 60% of the metal’s market value, and the metal was only part of what you paid in the first place.

A plain platinum band weighing seven grams might return somewhere in the low hundreds as scrap, even though it cost £900 new. That is not a scam; it is simply what raw metal is worth once the ring is melted.

Selling a ring intact to a second-hand jewellery specialist or at auction usually beats scrap, because someone is buying the ring rather than the raw material. Antique or signed pieces do better again. But a modern plain band has no scarcity value.

Two practical points. Keep the certificate for any centre stone, because a ring with paperwork sells far more easily than one without. And insure the ring for its replacement cost, not its scrap value, because replacement is what actually happens if it is lost.

Should you choose platinum?

Choose platinum if you want a white metal that will still be white in twenty years with no plating appointments, if you have sensitive skin (950 platinum is about as kind to skin as jewellery metal gets), or if you like the substantial weight of it on the hand. Some people love that weight. Some find it noticeable all day.

Choose 18ct white gold if you want a similar look for less, and you are happy to have it re-plated occasionally. Choose 18ct yellow or rose gold if you simply prefer a warm colour, in which case platinum was never really the question.

One more thing worth knowing. Platinum is tougher than gold in daily wear, and if a platinum ring rubs against a gold ring on the same finger every day, the gold one will show wear first. Buying the pair in the same metal avoids that. Our Tiara Pear Cut Bridal Set in Platinum at £999 is designed as a matched pair for exactly that reason.

Frequently asked questions

Is platinum stronger than gold?

It is denser and more durable over a lifetime, but it is not harder in the scratch sense. Platinum marks easily; the marks just do not remove metal. 9ct gold actually resists scratching better. Platinum wins on longevity, not on staying shiny.

Does a platinum ring need any maintenance?

Very little. No re-plating, ever. Most owners have theirs polished every few years if they prefer a bright finish, and many leave the patina alone because they like it. Warm water, washing-up liquid and a soft brush handle everyday cleaning.

Can a platinum wedding ring be resized?

Usually yes, though it needs a jeweller with the right equipment because of the high melting point. Plain bands and half eternity bands resize well. Full eternity bands, with stones all the way round, generally cannot be resized in any metal.

Why is a platinum ring more expensive if platinum sometimes trades below gold?

Because the ring contains roughly 35 to 40% more metal by weight, at 95% purity instead of 75%, and takes longer and costs more to manufacture. Those three factors do not change when the markets move.

Are lab-grown diamonds a good match for platinum?

An excellent match. Lab-grown diamonds are real diamonds with identical hardness and sparkle to mined ones, at a much lower price, so more of your budget can go into the metal and the making. Every centre stone we sell arrives with a free IGI certificate confirming its grades.

Take a look

Browse our wedding ring collection to compare platinum against gold at the same price points, or the engagement ring collection if you are choosing both rings together.

Everything is hand-made in solid platinum or gold in our North Harrow workshop in London, with free insured UK delivery and 30-day returns. If you want a specific width, weight or design, we will make it to order, and there is no extra charge for the design work.