October 18, 2026

White Gold vs Platinum vs Silver: How to Tell Them Apart

By Sasha Tarasova

Filed under Hallmarks, Dating & AuthenticationBuying Guides

Short answer: to tell white gold, platinum and silver apart, read the marks first: PT950, PLAT or IRIDPLAT mean platinum; 750, 585, 18K or 14K on a white metal mean white gold; 925 or Sterling mean silver. Then use weight: platinum is roughly twice as dense as silver and noticeably heavier than white gold. Wear helps too: platinum develops a soft grey patina, white gold shows yellowish patches where rhodium wears, and silver tarnishes. A jeweler's XRF test settles it.

All three look much the same in a shop window, especially when they are freshly polished or rhodium plated, and that is exactly why the difference matters. Platinum is the densest and usually the most expensive, white gold sits in the middle, and silver is the cheapest and softest. A listing that confuses them, by accident or not, can be off by a great deal. This guide covers the marks, the physics and the wear patterns, with particular attention to antique jewelry, where the metal is also a dating clue.

What is the difference between white gold, platinum and silver?

They are three different precious metals. Platinum jewelry is usually 90 to 95% pure platinum. White gold is gold alloyed with whitening metals and usually rhodium plated. Silver jewelry is usually sterling: 92.5% silver alloyed with copper.

• Platinum is naturally white, very dense and does not tarnish. It is usually alloyed with small amounts of iridium, ruthenium or cobalt.
• White gold contains the same gold as yellow gold of the same karat, 75% for 18k and 58.3% for 14k, with nickel or palladium to bleach the colour. The alloy is faintly grey or yellowish, so most pieces are plated with rhodium.
• Sterling silver is bright white when polished but soft, and it tarnishes as it reacts with sulfur in the air.

A fourth white metal, palladium, a lighter relative of platinum, also turns up in jewelry, particularly from the 1940s and again in recent decades. It is usually marked PD or PALL with a fineness number.

What marks tell white gold, platinum and silver apart?

The fineness mark is the first and best clue. Look inside ring shanks, on clasps and on the backs of pendants with a 10x loupe.

Two cautions. Marks are claims, not proof, and fake platinum marks exist on reproductions. And a rhodium-plated 925 piece looks almost exactly like white gold; only the mark, the weight and eventually the tarnish give it away. Our decoder of gold stamps and fineness numbers covers the gold side in detail, and our guide to reading a hallmark explains assay office marks. In Britain, platinum has had its own hallmark since 1975.

How do white gold, platinum and silver compare?

Side by side, the clearest differences are density, purity, how each metal wears, and cost of ownership.

Does weight tell you if it is platinum?

Yes, more reliably than almost any other home check. Platinum is about twice as dense as sterling silver and about a third denser than 18k white gold, so two rings of the same size and design differ clearly in weight.

In the hand, platinum feels surprisingly heavy for its size, and anyone who handles jewelry regularly learns to notice it. For a number rather than an impression, a specific gravity test works on solid, stone-free pieces: weigh the piece in air, then weigh the water it displaces on a scale reading to 0.01g, and divide the first by the second. A result around 20 or above points to platinum, around 14 to 16 to 18k white gold, and around 10.4 to sterling silver. Stones, hollow sections and small pieces make the result unreliable, so treat it as supporting evidence. Our guide on how to tell if silver is real walks through the method step by step.

How do white gold, platinum and silver wear over time?

Each metal ages in its own way, and wear is often the quickest visual clue on a used or antique piece.

• Platinum develops a patina: a soft, satin grey surface made of countless tiny scratches. Because platinum is displaced rather than worn away when scratched, it holds its weight well over decades, which is one reason it is valued for claw settings. Many collectors like the patina; a jeweler can polish it back to a bright finish.
• White gold wears through its rhodium plating, usually first on the underside of a ring shank, revealing a warmer, faintly yellow or grey alloy beneath. Yellowish patches on a white ring are a strong hint of white gold.
• Silver tarnishes, turning golden-brown, then grey and black, especially in recesses. It also scratches and dents easily, so silver rings soften in outline with wear.

Platinum does not tarnish. A white metal that has darkened, particularly in crevices, is far more likely to be silver than platinum or white gold.

Is platinum magnetic?

Platinum is not noticeably magnetic in ordinary jewelry alloys, and neither are white gold nor silver. The exception is some platinum-cobalt alloys, used in modern jewelry because they cast well, which can be weakly attracted to a strong magnet.

So the magnet test cannot separate the three white metals. What it does well is expose a base-metal core: a piece that pulls firmly toward a strong neodymium magnet is probably steel underneath plating. A faint drag on a piece marked PT950 is not, by itself, a reason for suspicion, and should simply be confirmed with an XRF test. Our guide on how to tell if gold is real explains the limits of the magnet test in more detail.

How can you tell platinum from white gold in antique jewelry?

Start with the date. Platinum became the fashionable white metal for fine jewelry around 1900, when improved torches made it practical to work, and it dominates Edwardian and Art Deco jewelry. White gold arrived in the 1910s and spread through the 1920s as a cheaper substitute.

• Edwardian, roughly 1900–1915. Fine pieces are usually platinum or platinum-topped gold, often with very fine milgrain and pierced, lacy galleries that platinum's strength made possible. Our Edwardian jewelry guide covers the period.
• Art Deco, 1920s–1930s. Platinum remained the material of choice for high jewelry, while white gold was used widely in more accessible pieces.
• 1940s. Platinum was diverted to war use during the Second World War, so white gold and palladium stood in for it.
• Georgian and Victorian. Before platinum, diamonds were usually set in silver over gold: a silver face to flatter white stones, backed with gold for strength and comfort. The silver tarnishes and can leave dark marks on skin and fabric.

Reproductions complicate the picture. Many "Art Deco" rings made in recent decades are cast in white gold, sometimes with platinum marks they do not deserve, and freshly rhodium plated to look uniform. Our guide to spotting a reproduction Art Deco ring covers the construction clues that matter more than colour.

How do jewelers test white metals?

The standard professional test is XRF, X-ray fluorescence, which reads the surface composition in seconds without marking the piece. Jewelers also use acid tests on a touchstone and specific gravity.

• XRF analysis. Non-destructive and precise for the surface. On plated pieces it may read the rhodium as well as the metal beneath, which an experienced operator accounts for.
• Acid testing. A streak of metal on a touchstone is tested with acids; platinum resists acids that dissolve gold and silver. It is quick and cheap, but involves filing or rubbing the piece.
• Specific gravity. As described above, useful on solid, stone-free pieces.

A practical checklist for an unknown white metal:

1. Find every mark with a loupe, including on clasps and backs.
2. Weigh it in grams and compare with similar pieces in known metals.
3. Look at wear points for yellowish patches, satin patina or tarnish.
4. Try a strong magnet on the body of the piece, not the clasp.
5. Check the construction against the claimed date.
6. Ask a jeweler for an XRF reading before paying a platinum price.

Which should you choose: white gold, platinum or silver?

Choose platinum for a ring that will be worn every day and hold a valuable stone for decades, white gold for a white look at a lower price with periodic re-plating, and silver for fashion and occasional pieces rather than heirloom settings.

Platinum costs more per piece because it is denser, so a ring uses more metal by weight, and because it is purer and harder to work. It needs no plating, and its claws wear slowly. White gold is lighter on the hand and the budget, and harder on the surface, but it needs re-plating to stay bright white, and nickel white gold can trouble sensitive skin. Silver is soft, tarnishes and is not a good long-term setting for a valuable stone, but it is honest, affordable and repairable. For antique pieces, the right metal is simply the one the piece was made in; replacing an Edwardian platinum setting with white gold would remove much of what makes it worth having.

Questions people actually ask

How can I tell if my ring is platinum or white gold?

Look inside the band for a mark: PT950, PLAT or IRIDPLAT mean platinum, while 750, 585, 18K or 14K mean white gold. Platinum also feels noticeably heavier for its size. If the ring shows yellowish patches where plating has worn, it is almost certainly white gold. A jeweler's XRF test confirms the metal quickly without marking the ring.

Is platinum heavier than white gold?

Yes. Platinum has a density of roughly 20 to 21.5 grams per cubic centimetre depending on the alloy, against roughly 14.5 to 16 for 18k white gold and less for 14k. A platinum ring therefore weighs around a third more than the same design in 18k white gold, and close to twice as much as one in sterling silver.

Does platinum tarnish?

No. Platinum does not tarnish or oxidise in normal wear. Over time it develops a soft, satin grey patina made of fine surface scratches, which some people like and which a jeweler can polish away. If a white metal piece has darkened or turned black in its crevices, it is much more likely to be silver than platinum or white gold.

What does IRIDPLAT mean?

IRIDPLAT means the piece is made of platinum alloyed with iridium, often marked 10% IRID PLAT for a mix of about 90% platinum and 10% iridium. Iridium hardens platinum, and the mark is typical of American jewelry from the early and mid twentieth century. It is a genuine platinum mark, not a plating or a lesser metal.

Can silver look like white gold?

Yes. Modern sterling silver is often rhodium plated, which gives it the same bright white finish as plated white gold. The giveaways are the 925 or Sterling mark, the lighter weight, and eventually tarnish where the plating wears. Silver is also much softer, so edges and claws wear and bend more readily than on white gold.

Is platinum magnetic?

Platinum in ordinary jewelry alloys is not noticeably magnetic, but some platinum-cobalt alloys can be weakly attracted to a strong magnet. White gold and silver should not be attracted either. A firm pull suggests a steel core under plating. A faint drag on a piece marked PT950 is not proof of anything; confirm it with an XRF test.

Why was platinum used in Edwardian and Art Deco jewelry?

Platinum is strong, white and does not tarnish, so it can hold diamonds securely in very fine, delicate settings and flatters colourless stones. Improvements in torches around 1900 made it practical to work at scale, and it became the fashionable white metal for fine jewelry. White gold arrived in the 1910s and spread in the 1920s as a less expensive substitute.

Every piece we list is described by metal, and when a piece is platinum or platinum-topped we say so. You can browse our antique and vintage jewelry, and if you want an Edwardian or Art Deco platinum piece found and checked before you buy, our sourcing service does the searching. More on marks sits in our hallmarks archive.