Written in Silver
Home · Sterling silver vs pure silver

Sterling Silver vs Pure Silver: A Buyer's Guide

Walk into any jeweller's, online or off, and you'll find pieces described as "925 silver", "sterling silver", "fine silver", "pure silver", "Argentium", and occasionally just "silver", with no further detail. Some of those terms mean the same thing. Some are very different alloys with very different properties. And some are sales language that doesn't legally have to mean anything at all.

This guide explains the difference, what the hallmark numbers actually tell you, why almost all silver jewellery is sterling and not pure silver, and what to check before you spend the money.

A selection of sterling silver jewellery pieces showing different finishes and designs

What "pure silver" actually means

Pure silver, often called fine silver in the trade, is 99.9% silver. The remaining 0.1% is trace elements that can't economically be refined out. You'll see it stamped 999 or sometimes .999. Fine silver is bright, soft, and tarnishes much more slowly than sterling because there's almost no copper in it for sulphur to attack.

It is also, for jewellery, almost too soft to be useful. A fine-silver ring bends out of round if you grip something hard with it. A fine-silver prong setting on a stone deforms with normal wear and the stone falls out. A fine-silver chain stretches and weakens at every link. Pure silver is what bullion bars and investment coins are made of, and what's used as a starting material before being alloyed.

The exception is metal-clay work. Pieces made from precious-metal clay (PMC, Art Clay) are often fired into a result that's effectively fine silver. The pieces are decorative more than structural, and they have a slightly soft, satin look you don't get from cast or forged sterling.

What sterling silver actually is

Sterling silver is 92.5% silver and 7.5% other metals — almost always copper. That's where the 925 stamp comes from. The copper does several useful things at once: it makes the metal stiff enough to hold a setting, hard enough to take a high polish without buffing through, and durable enough to wear daily for decades.

The cost is that the copper also reacts with sulphur in the air to form the dark tarnish that builds up on every piece of silver jewellery sooner or later. That tarnish is easily removed (see our guide on cleaning tarnished silver), but it's the trade-off you accept for getting a piece that lasts.

Sterling has been the legal British standard for silver since the late 12th century. The word itself probably comes from the Old English steorling, meaning a small star — a reference to the star marks struck on the early Norman pennies that were the original standard for silver coinage. Whatever its origin, the alloy ratio has barely changed in eight hundred years. It works.

The other alloys you'll see

Most jewellery you encounter will be one of these:

How to read a British silver hallmark

A proper British hallmark is the most reliable way to know exactly what you're buying. By law, any silver item sold in the UK weighing more than 7.78 grams must be hallmarked. A hallmark contains four or five separate stamps:

Pieces under 7.78g — most light earrings, thin chains, small charms — don't legally need a hallmark. Reputable makers usually stamp them anyway, with at least a sponsor's mark and the 925 fineness, even if they're not legally obligated to.

If a piece has no stamp at all and no documentation, treat it as unverified. It might be sterling, might be plate, might be a low-grade alloy. The cost of getting a piece independently assayed in the UK is around £30 and most assay offices will do it for the public on appointment.

Close-up of a sterling silver pendant showing the polished surface and hallmark details

Durability — what to expect from each

Pure silver, as covered, is too soft for most jewellery. If you bought a pure-silver ring and wore it daily, you would notice it going out of shape within months. Pure-silver chains stretch and break under their own weight over a few years. Pure silver is for collectors, for decorative work, for fine-art pieces that are looked at more than worn.

Sterling silver is roughly twice as hard as fine silver. A well-made sterling ring will hold its shape for decades. A sterling chain at a sensible link weight will outlast most of the people who wear it. Sterling will scratch — softer than gold, much softer than steel — but it polishes back to shine. The most common failure on a daily-worn sterling piece is not the metal itself but the findings: a bent jump ring, a worn-out clasp, a thinning point where a ring contacts another ring. All of those are cheap to fix.

Argentium sits between sterling and fine silver for hardness when first made, but the alloy work-hardens significantly when worked, so a finished Argentium piece is usually as durable as standard sterling. Its main appeal is tarnish resistance.

Price differences and what's driving them

The raw metal cost difference between sterling and fine silver is small — about 8% by weight. But you almost never see that price difference reflected in finished jewellery. Most fine-silver work is small studio metal-clay pieces, and the price reflects the maker's time rather than the metal.

The real price drivers in any silver piece are, in rough order of impact: how much labour the piece took, how the piece is finished (hand-polished vs tumbled vs machine-polished), whether stones are involved, and the maker's overhead. Material cost is usually a small fraction. A ring with 8 grams of sterling silver costs the maker around £5 in metal at current spot prices. A finished hand-made silver ring sells for £80 to £200 in the UK. The metal is the cheap part.

What this means as a buyer: don't shop on metal type alone. A well-made sterling piece will outlast and outperform a poorly-made fine silver piece by any practical measure. Look at the maker's reputation, the finish quality, and whether the piece is hallmarked.

What to look for when buying

The short version

For almost every piece of jewellery you'll buy or be given, sterling silver (925) is what you want. Pure silver is too soft. Plated isn't worth the eventual disappointment. Argentium is a fine premium option if you hate polishing. Anything called "German silver" or "nickel silver" isn't silver at all. Check for the hallmark, check the finish, and trust your eye on weight and feel. The piece in your hand tells you more than the description on the tag.

For more on care, see our silver care guide. For commissions and bespoke work, the bespoke commissions page covers the process. Questions about a specific piece, hallmarked or otherwise: [email protected].