Hallmarks on Jewellery: What 925, 585 and 750 Mean and How to Read Them

Three Tiny Marks That Tell the Truth

On the inside of a ring, there are marks. Small, barely legible without a magnifying glass. Most people never notice them. Those who do notice don't always understand what they mean.

These marks are hallmarks. They tell you how much precious metal is in the alloy. 925 on a silver ring means 92.5% of the alloy is pure silver. 585 on a gold ring means 58.5% pure gold. 750 means 75%. The rest is other metals that make the alloy harder, stronger and wearable.

A hallmark is not marketing. In the United Kingdom, it is the law. The Hallmarking Act 1973 makes it a criminal offence to describe an article as being made of gold, silver or platinum unless it has been hallmarked by an authorised assay office. A fake hallmark carries a penalty of up to ten years in prison. When you see "925" on a piece of jewellery bought from a legitimate British retailer, it is not the seller's opinion. It is a fact verified by an independent testing authority.

But there are nuances. Many nuances. And this guide covers all of them.

Silver: 925, 958, 999

925: Sterling Silver

The most common silver standard in jewellery. 92.5% silver + 7.5% other metals (usually copper). The name "sterling" comes from the English currency: the pound sterling was originally a pound weight of this grade of silver.

Why copper. Pure silver is too soft. You could make a ring from it, but it would deform within a week of daily wear. Copper adds strength, making the metal practical for everyday jewellery. 7.5% copper strikes a balance: enough for durability, not enough for the metal to lose its silvery colour and lustre.

Tarnish. The copper in 925 silver causes the darkening. Copper reacts with sulphur in the air, producing copper sulphide: a dark layer. Pure silver also tarnishes, but more slowly. More on dealing with this in tarnish: how to restore.

Rhodium plating. Many 925 silver pieces are coated with a thin layer of rhodium: a platinum-group metal that does not tarnish. Rhodium-plated silver is brighter, whiter and doesn't darken while the coating lasts. But rhodium wears away over time (6-18 months with daily wear).

British hallmark. On sterling silver, you will see the lion passant (a walking lion): this has been the standard mark for sterling silver in England since the 14th century. In Scotland, the mark is a lion rampant (standing on hind legs). In addition, the assay office mark and the fineness number (925) will be present.

More detail in complete guide to silver 925.

958: Britannia Silver

95.8% silver. A higher standard than sterling, introduced in 1697 to prevent the melting of sterling silver coinage into plate. The hallmark is a figure of Britannia. Used today mainly by specialist silversmiths for high-quality flatware and artisan pieces.

999: Fine Silver

99.9% silver. Too soft for jewellery: it dents with finger pressure. Used for investment bars and coins, not rings. If someone sells you a "fine silver 999 ring for daily wear," it is either a misrepresentation or a ring that will lose its shape within a month.

Gold: 375, 585, 750, 916, 999

375: 9 Carat

37.5% gold. The minimum standard that may legally be described as "gold" in the United Kingdom. This is a distinctly British standard, and many other countries do not recognise 9 carat as gold at all. In Germany, the minimum is 8 carat (333). In France and Italy, the minimum is 18 carat (750) for most retail purposes.

Characteristics. Pale colour (less than half is gold), high durability (lots of alloying metals = hard alloy), relatively affordable. May cause allergic reactions because the alloy often contains nickel.

585: 14 Carat

58.5% gold. Popular in much of Europe and the standard in the United States (marked as 14K). Less common in British high-street jewellery than 9 carat, but widely available.

Colours of 585 gold:

• Yellow: gold + silver + copper. Classic warm colour.
• White: gold + nickel or palladium. Silvery colour. The nickel variant may trigger allergies. Palladium does not, but costs more.
• Rose (red): gold + copper (more than in yellow). The more copper, the redder the hue.

750: 18 Carat

75% gold. The international luxury standard. Heritage luxury maisons work predominantly with 750. In the UK, this is the standard for fine jewellery and engagement rings from established jewellers.

Characteristics. Rich, deep colour. Softer than 585 (more gold = softer). More expensive. Less prone to tarnish.

585 vs 750: visually, the difference is noticeable: 750 is brighter, warmer, richer in colour. By price, 750 is roughly 30-50% more expensive than 585 for the same weight.

916: 22 Carat

91.6% gold. The standard in India and the Middle East. Very soft, intensely yellow, expensive. Too soft for everyday rings and bracelets (they deform). For ceremonial jewellery worn on special occasions, ideal.

999: Pure Gold (24 Carat)

99.9% gold. Egg-yolk yellow, soft as wax. Scratches with a fingernail. Not used for wearable jewellery (except coins and bars). If sold as a "daily wear ring in 999 gold," the seller is misleading you.

The Carat vs Fineness System

Fineness (millesimal). Used in continental Europe and most of the world. The number represents the parts per thousand of pure metal. 585 = 585 out of 1,000 parts = 58.5%.

Carat system. Used in the UK, US and Canada. 24 carats = pure gold. 18 carats = 18/24 = 75%. 14 carats = 14/24 = 58.3%.

Note: "carat" (gold purity) and "carat" (diamond weight) are homonyms. An 18-carat gold ring and an 18-carat diamond are entirely different things. Gold carat = purity. Diamond carat = weight (0.2 grams). In American English, the distinction is sometimes made with spelling: karat (gold) vs carat (gemstones).

Why 585 rather than 583. Before 1999, the Soviet Union and several Eastern European countries used the fineness 583 (exactly 14 carats = 58.33...%). Russia switched to 585 in 1999 to align with the international 14K standard. The difference is 0.17% gold: imperceptible in practice, but legally significant. A piece stamped "583" is not a fake: it is authentic 14-carat gold made before the standard changed.

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The British Hallmarking System

Britain has the oldest compulsory hallmarking system in the world. It dates to 1300, when King Edward I decreed that all silver sold in London must contain at least 92.5% pure silver and be tested at Goldsmiths' Hall, the Hall of the Worshipful Company of Goldsmiths. The English word "hallmark" comes literally from "mark from the Hall."

The reason was pragmatic: goldsmiths were cheating. They diluted silver with cheaper metals and sold it at the price of pure silver. Buyers could not tell the difference. A state-controlled hallmark solved the problem: if the piece bears the assay office mark, the composition has been tested. You can trust it.

The Four Marks

A full British hallmark consists of up to four marks, stamped together:

1. The Sponsor's Mark (Maker's Mark). The initials of the manufacturer or sponsor, in a distinctive shield shape. This identifies who made or submitted the piece for hallmarking. Every sponsor must register their mark with an assay office. The shield shape is unique to each office: London uses a plain oval or rectangle, Birmingham a square, Sheffield an octagon. If the same initials appear in different shield shapes, they belong to different makers registered at different offices.

2. The Fineness (Standard) Mark. This indicates the precious metal and its purity:

• Lion passant = sterling silver (925) in England
• Crown followed by fineness number = gold (e.g., 750 for 18 carat)
• Orb = platinum

3. The Assay Office Mark. This identifies which office tested and hallmarked the piece:

• Leopard's head = London (Goldsmiths' Hall, operating since 1300)
• Anchor = Birmingham (operating since 1773)
• Rose = Sheffield (operating since 1773)
• Castle = Edinburgh (operating since 1457)

The London leopard's head is the oldest assay office mark in continuous use anywhere in the world. If your ring carries a leopard's head, it was tested at the same institution that has been testing precious metals for over 700 years.

4. The Date Letter (optional since 1999). A letter in a specific font and shield shape indicating the year of hallmarking. Each assay office had its own cycle of letters and its own series of shield shapes that changed with each new cycle. Date letters were compulsory from the 15th century until 1999, when they became optional. They are still used voluntarily by some offices and are invaluable for dating antique pieces.

Reading Date Letters

The date letter system can seem bewildering at first because each assay office used a different alphabet cycle, different fonts and different shield shapes. A piece hallmarked in London in 1800 bears a different letter than one hallmarked in Birmingham the same year. Reference guides published by the assay offices (all available free online) provide complete tables.

For antique pieces, the date letter is often the most historically interesting mark. A ring with a Birmingham anchor, the letter "A" in a square shield and a lion passant was hallmarked in 1773, the year Birmingham's office opened. Such dating is possible because the cycles are documented without gaps going back centuries.

The Hallmarking Act 1973

This is the law that governs hallmarking in the United Kingdom today. Key points:

• It is illegal to describe an unhallmarked article as gold, silver or platinum in trade.
• Exemptions exist for items below certain weight thresholds: articles under 1 gram for gold, 7.78 grams for silver and 0.5 grams for platinum do not require hallmarking.
• The Act applies to England, Wales, Scotland and Northern Ireland.
• Imported jewellery must be hallmarked by a UK assay office before it can be sold as precious metal.

Post-Brexit Changes

Since Brexit, UK hallmarks are no longer automatically recognised by EU member states. Jewellery hallmarked in Birmingham and sold in France would need to be re-hallmarked by a French bureau de garantie. However, the UK remains a member of the Vienna Convention on the Control of the Fineness and Hallmarking of Precious Metals, which means UK hallmarks are recognised by other Convention signatories (including Austria, the Netherlands, Sweden and others).

When a Hallmark Is Compulsory

For a British buyer this is the practical heart of the subject. In most of the world a fineness mark is a claim made by the manufacturer about its own goods. In the United Kingdom it is a statement by an independent body that has physically tested the metal, and applying it is not optional. Anyone who describes an article as gold, silver, platinum or palladium in the course of trade must have it hallmarked by a UK assay office first, or fall inside a narrow set of exemptions. That single difference explains why a British hallmark carries weight in the second-hand market that a bare "925" stamped abroad simply does not.

The Weight Thresholds

Compulsion starts at a weight, not at a value, and the thresholds are worth memorising because they explain most of the unmarked jewellery you will meet in a British shop.

• Gold: 1 gram. Anything heavier must be hallmarked. Fine chain, small stud earrings and slender stacking rings often fall under the limit, which is why perfectly genuine 9 carat studs frequently carry nothing at all.
• Silver: 7.78 grams. The odd figure is the metric conversion of a quarter of a troy ounce, inherited from the old imperial rules. It is a generous allowance, so a great many small silver pieces are legitimately unmarked.
• Platinum: 0.5 grams. The tightest threshold of the four, because platinum is dense and valuable enough that even a tiny article is worth misrepresenting. Compulsory platinum hallmarking began in 1975.
• Palladium: 1 gram. The newest addition. Palladium only became a hallmarkable metal in the United Kingdom on 1 January 2010, so a palladium wedding band bought before then may be unmarked and still entirely honest.

Weight is judged on the whole article, not on the precious metal in it, and stones are excluded from the calculation. Two other exemptions come up regularly: articles made before 1950 that are demonstrably of the required fineness can be sold unmarked as antiques, and pieces sold purely as scrap or for melting sit outside the rules. Everything else that crosses a shop counter as precious metal should carry a mark, and a trader who shrugs at its absence is telling you something.

The Four Working Assay Offices

Britain once had assay offices in a dozen cities, from Chester and Exeter to Newcastle, Dublin, Glasgow and York. Four remain in operation, and their town marks are the fastest way to place a piece.

• London: the leopard's head. Goldsmiths' Hall in the City, testing since 1300, and the mark from which the word hallmark itself descends. Look for a crowned leopard's head on pieces before 1821 and an uncrowned one after.
• Birmingham: the anchor. Opened in 1773 after Matthew Boulton lobbied Parliament, tired of carting silver to London by coach. The story that the anchor and Sheffield's crown were drawn from the Crown and Anchor tavern where the two towns' campaigners met is repeated everywhere, and the offices themselves are happy to let it stand.
• Sheffield: the rose. Also opened in 1773, and for most of its life the mark was a crown, reflecting the Crown and Anchor legend. It changed to the Yorkshire rose in 1975 to end the confusion with the crown that signalled gold fineness.
• Edinburgh: the castle. The Incorporation of Goldsmiths of the City of Edinburgh has records back to 1457, which makes it the oldest continuously operating craft body in Scotland. The three-towered castle mark is the one to look for on Scottish silver.

The offices are legally independent of the trade and of each other, and any of them can hallmark any article regardless of where it was made. A piece struck in Birmingham and a piece struck in Edinburgh carry exactly the same legal force.

Since 1999 the compulsory part of a British mark has shrunk to three elements: the sponsor's mark, the millesimal fineness number and the assay office town mark. Everything else is voluntary. The date letter, the lion passant for sterling, the Britannia figure for 958, the crown for gold and the orb for platinum are now traditional marks that a sponsor may request and pay for, and many do because collectors and customers expect them. A modern ring showing only "PW", "750" and an anchor is fully and legally hallmarked. A ring showing a crown and a lion as well simply belongs to a maker who thinks the old pictures are worth the extra strike, and on the resale bench they usually are.

Convention Hallmarks and Continental Marks

Two other kinds of mark turn up constantly and confuse people who have learned only the British system.

The Convention Hallmark comes from the Vienna Convention on the Control of the Fineness and Hallmarking of Precious Metal Objects, which the United Kingdom joined in 1972. Its Common Control Mark shows a set of scales inside a shape that identifies the metal: an oval outline for gold, a shield-like shape for silver, a diamond shape for platinum and an irregular outline for palladium, with the fineness in figures inside. A Convention mark applied by any signatory office, whether in Vienna, Amsterdam, Prague or Dublin, is legally accepted in Britain without re-testing, and a UK Convention mark travels the other way in return. This is the route by which a great deal of imported jewellery legally reaches a British shop window, and it is why a ring with no leopard's head can still be perfectly compliant.

Continental fineness marks read differently. Most of Europe abandoned pictorial standards in favour of plain numbers early, so a French, Italian or German piece will typically show only its fineness in parts per thousand, often alongside a small national device: a boar's head or crab for French silver on older work, an eagle's head for French gold, a star and a province number for Italy, a crescent and crown for Germany. None of these certify anything about testing by an independent body in the British sense, because in most of the continent the responsibility for accuracy sits with the manufacturer and is policed by spot checks rather than by universal assay. A 750 stamp from Vicenza is a manufacturer's declaration; a crown and 750 with a rose beside it is a laboratory result. Both can be true. Only one has been proved.

Platinum: 850, 900, 950

Platinum is the most expensive jewellery metal. Heavier than gold (density 21.45 vs 19.3 g/cm3), stronger, more corrosion-resistant, hypoallergenic.

950: The Standard

95% platinum + 5% other metals (iridium, ruthenium, cobalt). The most common platinum standard for jewellery. Expensive. Very expensive.

The British hallmark for platinum 950 is an orb (a circle with a cross on top) plus the number 950. Platinum hallmarking became compulsory in the UK in 1975.

Platinum vs white gold. White gold is yellow gold alloyed with white metals (palladium or nickel) and then rhodium-plated. Over time, the rhodium coating wears through and a yellowish tinge appears. Platinum is naturally white and stays white permanently: it requires no plating. This is the main practical distinction between the two.

900 and 850

Below the 950 standard sit two lower alloys that a British buyer will meet mostly on imported or vintage work. Platinum 900, ninety per cent platinum usually alloyed with iridium, was the American workhorse of the early twentieth century and holds the edge on filigree and millegrain work beautifully, which is why so much Edwardian and art deco jewellery is made of it. Platinum 850 is common in Japanese and some German production and is a touch harder still. Both are legal hallmarking standards in the United Kingdom, alongside 999 and 950, so a genuine 850 piece will carry an orb and the number 850 without any suggestion of being second rate.

The practical consequence is small but real. A lower platinum standard means slightly more alloy metal, so the colour warms a fraction and the metal takes a crisper edge on engraving. It also means slightly less platinum by weight, which matters when a piece is valued for its metal content rather than its design. If a dealer quotes you for "platinum" without naming the standard, ask, because the gap between 850 and 950 is a tenth of the metal in the piece.

Why Choose Platinum at All

Platinum earns its place on three counts, and none of them is shine. First, it does not need plating. White gold is a yellow alloy bleached with palladium or nickel and then rhodium-plated, and rhodium wears through in a year or two of daily wear, so the ring warms towards straw and goes back to the bench for replating. Platinum is white all the way through and stays that way for a lifetime.

Second, it moves rather than breaks. When platinum is scratched, the metal is displaced to the sides of the groove instead of being lost, which is why an old platinum ring develops a soft grey patina rather than thinning. A jeweller can polish it back or leave the patina, and either way the mass stays on the finger. Gold, by contrast, loses a little metal to every polish. Over decades a platinum claw holding a stone will bend before it snaps, which is exactly the behaviour you want from the part standing between a diamond and a drain.

Third, it is genuinely inert. Platinum in jewellery alloys is combined with iridium, ruthenium or cobalt rather than nickel, so it is the safest choice for skin that reacts to everything else, and it does not tarnish in British damp the way silver does. The costs are weight, since platinum is noticeably heavier than gold and some people dislike that on the hand, and the work involved, because it needs higher temperatures and specialist tools at the bench. Whether that trade sits well with you is a question of how you actually wear a ring rather than of what the metal is worth.

Stainless Steel: No Hallmark, But Not Without Standards

Stainless steel is not hallmarked because it is not a precious metal. But it has its own standards.

316L

The most common "jewellery grade" steel. Composition: iron + chromium (16-18%) + nickel (10-14%) + molybdenum (2-3%) + carbon (less than 0.03%, hence the "L" for Low carbon). Marked as "316L," "Surgical Steel" or "Stainless Steel."

Not to be confused with 304. 304 steel is also stainless but lacks molybdenum. Less resistant to corrosion, especially in salt water. 316L is the standard for jewellery and medical instruments. 304 is for kitchen equipment.

More detail in brass, steel and silver comparison.

How to Read a Hallmark

At Home (approximate)

Visual inspection. Take a loupe (10x magnification). Look for marks on the inside of a ring, on the clasp of a chain, on the post of an earring, on the plate of a bracelet clasp. Hallmarks are small: typically 1-2 mm. Without magnification, you may miss them entirely.

What you are looking for. On British silver: a small walking lion (lion passant) plus a letter or number. On British gold: a crown (on older pieces) or the fineness number (on modern pieces after 1999 when the crown became optional), plus an assay office symbol. On continental European pieces: a three-digit number (925, 750, 585) sometimes accompanied by a national symbol (star, eagle head, etc.).

Magnet test. Hold a fridge magnet near the piece. Gold, silver and platinum are not magnetic. If it sticks, it is not a precious metal (or contains a significant proportion of iron). But: 316L stainless steel is also weakly magnetic or non-magnetic. A magnet rules out crude fakes but not all of them.

Smell test. Silver and gold have no smell. Brass and copper have a characteristic metallic odour. If a ring smells of "old coins," it is not precious metal.

Sound test. Silver has a characteristic high, sustained ring (like a small bell). Steel rings more briefly and dully. Brass is duller still.

Weight comparison. Gold is very dense: 19.3 g/cm3 for pure gold, around 15-16 g/cm3 for 18K alloys. A gold ring feels noticeably heavier than an identical-looking brass or steel ring. Silver (10.5 g/cm3 pure) is heavier than steel (8 g/cm3). If a supposedly gold ring feels light, that is grounds for suspicion.

At a Jeweller (accurate)

Touchstone test. The jeweller rubs the piece against a black stone (Lydian stone), leaving a streak. Acid is applied to the streak. The reaction reveals the fineness. An ancient method (used for thousands of years) but reliable.

X-ray fluorescence (XRF). A device directs X-rays at the piece and analyses the reflected spectrum. Determines composition to tenths of a percent. Does not damage the piece. Takes 30-60 seconds. Most jewellers and assay offices offer this service.

Hydrostatic weighing. The piece is weighed in air and in water. The difference gives the density. A gold 585 ring has a density of about 13.1 g/cm3. Silver 925 is about 10.4 g/cm3. If the density does not match the claimed fineness, the composition is different. Accurate and requires only a precision scale with a water container.

What If There Is No Hallmark

An absent mark is not proof of a fake, and treating it that way will cost you good jewellery. Work through the possibilities in order.

The piece may be under weight. Check the thresholds first. A pair of silver studs weighing three grams the pair, a fine gold chain under a gram, a slender platinum band under half a gram: none of these needs a mark, and reputable British shops sell them unmarked every day.

It may be old. Articles made before 1950 are exempt if they are of the stated fineness, so a Victorian mourning brooch or a Georgian ring may carry only a maker's punch, a worn fragment, or nothing. On very old work the mark was often struck on a part that has since been repaired away.

It may have been worn off or worked away. The inside of a ring is exactly where a mark sits and exactly where sizing takes place. A ring resized twice over thirty years frequently loses its hallmark to the jeweller's saw, and the piece is no less gold for it. Look at the shank for a bright seam of newer solder before you draw conclusions.

It may be imported and legitimately Convention marked. Look again with a stronger loupe for the small scales symbol. It is easy to miss on a curved surface.

It may be plated or base. Only after the first four have been ruled out. Run the magnet, the weight and the smell checks described above, and if the piece matters to you, take it for an XRF reading. All four UK assay offices offer testing and hallmarking to members of the public through their laboratories, and having a genuine unmarked inheritance hallmarked properly costs a modest fee and settles the question permanently. For anything you intend to insure or sell, that is money well spent.

If a trader is selling a piece described as gold or silver, it is over the threshold, it is post-1950 and it carries no British or Convention mark, that is not a grey area. It is a breach of the Hallmarking Act, and Trading Standards will take the report.

Fakes and How to Spot Them

Gold-Plated Brass Sold as Gold

The classic fraud. A brass ring coated with a thin layer of gold. Visually it looks like gold. By weight, it is lighter (brass is less dense than gold).

How to spot it. Weight test: a gold ring is noticeably heavier than an identical brass one. Acid test: a drop of nitric acid on an inconspicuous area: brass turns green, gold does not react. This test should be done by a jeweller, not at home.

Silver-Plated Copper Sold as Silver

A copper item coated with silver. Visually it looks like silver. Over time, the plating wears off, revealing the copper (a reddish metal beneath the silver surface).

How to spot it. If a scratched surface reveals a copper colour underneath, it is not silver. Silver beneath a scratch remains silver.

"Jewellery Steel" Sold as Silver

Stainless steel visually resembles silver. Some sellers pass off steel pieces as silver. The difference is in weight (steel is lighter than silver), sound (steel rings differently, a more "hollow" sound) and hallmark (steel does not carry a 925 mark).

Clarification. Stainless steel is an excellent material. There is nothing wrong with a steel piece of jewellery. What is wrong is selling steel at the price of silver. The per-gram cost of steel and silver differs by 5-10 times.

Fake Hallmarks

A hallmark can itself be forged. Counterfeiters stamp fake marks onto lower-quality metal. Signs of a fake hallmark: blurred or asymmetrical outlines, the wrong shield shape for the claimed assay office, a fineness number that does not match the metal's colour or weight. Compare any suspicious mark against the reference images published by the UK assay offices. All four offices provide free online guides with photographs of genuine marks at every size.

If you are buying a significant piece and have doubts, submit it to an assay office. For a modest fee, they will test the metal and issue a certificate. This is the same process as the original hallmarking, and the result is authoritative.

History of Hallmarking

How It All Began

The world's first compulsory hallmarking system was established in England in 1300. King Edward I decreed that all silver sold in London must pass inspection at Goldsmiths' Hall. The word "hallmark" itself (literally "mark from the Hall") entered the English language from this practice.

The institution behind it, the Worshipful Company of Goldsmiths, is one of the 110 livery companies of the City of London. It was founded in the 13th century and received its first royal charter from Edward III in 1327. Since 1300, it has operated the London Assay Office without interruption, through the Black Death, the Great Fire of London, two world wars and every political upheaval in between.

Over 700 years, the system spread worldwide. Today, compulsory hallmarking operates in most EU countries, the UK, India, Japan and dozens of other nations. In the US and China, hallmarking is not compulsory: manufacturers mark items themselves and bear responsibility for accuracy.

France: The Poincon System

France introduced mandatory hallmarking in the 13th century under Philip the Bold, who in 1275 issued the first regulations on gold and silver content. The French system uses animal and mythological symbols rather than numbers to indicate fineness:

• Eagle head = 18K gold (750), French manufacture
• Owl = imported gold (any fineness)
• Horse head = 14K gold (585)
• Minerva's head = sterling silver (925)
• Dog's head = platinum 950

The eagle head for 18K gold has been used in France since 1838. It is one of the most recognised symbols in international jewellery. The Bureau de Garantie, which operates under the Direction Générale des Douanes, tests and stamps every piece sold in France.

Italy: The Stella System

Italy's hallmarking system is among the most structured in the world, governed by Law 251/1999. The mark consists of a five-pointed star (stella), followed by a two-digit province code and the maker's registration number.

The province code identifies where the manufacturer is registered: 52 = Arezzo, 6 = Alessandria (Valenza Po), 1 = Turin, 63 = Naples, 92 = Palermo. This system makes every Italian piece fully traceable to its maker. Arezzo (province 52) is the capital of industrial gold chain production: roughly 30% of the world's gold chains are made there. Valenza Po (province 6) is the centre of fine artisanal jewellery with gemstones.

Germany: Halbmond und Krone

The German system was codified with the Goldwarengesetz (Gold Goods Law) of 1884. The Halbmond und Krone (crescent and crown) mark identifies German-manufactured gold. Unlike the UK and France, German hallmarking is not compulsory, but any voluntary mark must be accurate, and falsifying a mark is a criminal offence under the Unfair Competition Act. Reputable German manufacturers always stamp their pieces.

Pforzheim in Baden-Württemberg has been the centre of German jewellery manufacturing since 1767, when Margrave Karl Friedrich von Baden established a watchmaking and jewellery manufactory there. Today over 350 companies in the Pforzheim area produce or process jewellery, watches and gemstones.

The Goldsmiths' Company

The Worshipful Company of Goldsmiths has operated the London Assay Office since 1300. It is one of the Great Twelve livery companies of the City of London. The Goldsmiths' Company both hallmarks precious metals and conducts the Trial of the Pyx, the annual testing of British coinage, a ceremony dating back to the 12th century.

The Vienna Convention

In 1972, several European countries signed the Vienna Convention on the Control of the Fineness and the Hallmarking of Precious Metals. Signatory countries (including Austria, the UK, Sweden, Finland, Ireland, the Netherlands, Switzerland, Portugal, Czech Republic and others) recognise each other's hallmarks. A piece hallmarked in Vienna does not need re-hallmarking in London.

Germany and France are not members of the Vienna Convention, although French poincons are widely recognised internationally through bilateral agreements.

Maker's Marks: Who Made This Piece

The maker's mark (sponsor's mark in UK terminology) identifies the individual or company who submitted the piece for hallmarking. It is not the same as the hallmark itself. The hallmark is applied by the assay office, the maker's mark by the maker.

In the UK, every maker must register a unique mark with an assay office before submitting work. The mark typically consists of initials set in a shaped cartouche. The cartouche shape varies by assay office: London uses a shield, Birmingham a circle or square, Sheffield a rectangular frame. A maker registered at London with initials "JH" in a shield is a different person from a maker registered at Birmingham with the same initials in a circle.

French maker's marks (poinçons de maître) are diamond-shaped for manufacturers and oval for importers. They must be registered with the Bureau de Garantie. In case of a dispute about a piece's composition, the maker's mark identifies who is legally responsible.

Italian maker's marks are embedded in the stella system itself: the number following the star is the maker's unique registration number within their province. The Chamber of Commerce for each province maintains the register.

For antique jewellery, maker's marks are of considerable historical interest. A piece bearing the mark of a documented Georgian or Victorian silversmith carries additional value as a documented artefact of the period, over and above its metal content. Specialist auction houses employ experts who can read marks from photographs and attribute pieces to specific workshops.

Hallmark and Allergy

Fineness affects allergenicity. The lower the gold fineness, the more alloying metals, and the higher the chance the alloy contains nickel.

585 yellow gold. Usually safe (alloy with copper and silver, no nickel).

585 white gold. Risky. Traditional white gold alloys contain nickel for the white colour. Modern versions use palladium instead, but not all. Ask.

375 gold. Higher risk. Lots of alloying metals = high probability of nickel.

925 silver. Usually safe. The alloy metal is copper, not nickel. But some manufacturers add small amounts of nickel.

316L stainless steel. Paradox: contains 10-14% nickel, but the nickel is bound in the crystal lattice and does not leach to the surface. Safe for most people with nickel allergies. But not all.

More detail in nickel allergy guide.

Hallmarks in Other Countries

France

One of the most elaborate systems. The French poincon system uses animal heads to indicate metal and purity. Eagle head = 18K gold (French manufacture). Owl = imported gold. Minerva head = silver. More in the French-specific article.

Italy

The stella (star) system: a five-pointed star followed by the province number and the maker's number. Italy's hallmarking system is among the most structured in Europe.

Germany

The Halbmond und Krone (crescent and crown) mark indicates German-manufactured gold. The fineness number accompanies it. Pforzheim has been the centre of the German jewellery industry since the 18th century.

Spain

Spain's contraste system is governed by the Law on Objects Made of Precious Metals (Ley 17/1985) and subsequent decrees. The oficinas de garantia (guarantee offices) operate at regional level, each with its own identifying mark. The fineness number (925, 750, 585) appears alongside the maker's mark and the office mark. Spain is a signatory to the Vienna Convention, so Spanish hallmarks are recognised across member countries.

India

The Bureau of Indian Standards (BIS) hallmark became compulsory in 2021. Before that date, hallmarking was voluntary and fraud was widespread. Look for the BIS triangle logo, the fineness (916, 750 or lower), and the jeweller's code. The 2021 reform was a significant consumer protection measure in a country that is one of the world's largest gold jewellery markets.

United States

No compulsory hallmarking. Manufacturers are legally required to be truthful about fineness if they mark pieces at all, and marking is regulated by the National Gold and Silver Marking Act. But there is no independent verification body analogous to the UK assay offices. A piece marked "14K" from a US manufacturer carries the manufacturer's own guarantee of accuracy, not a government certification.

Turkey

The single most common source of holiday gold brought back to Britain. Turkish gold is regulated by the Turkish Standards Institution and pieces carry a fineness number with a maker's registration, and the shops in Istanbul and the coastal resorts overwhelmingly sell 22 carat (916) and 14 carat (585) rather than the 9 carat that dominates the British high street. That is worth knowing before you fall in love with the colour, because 916 is soft and marks easily, and a 22 carat band worn daily on a working hand will show every knock within a year. Price is quoted by weight against the day's gold rate plus a making charge, which is a fairer system than it looks and makes haggling over the making charge, not the metal, the sensible move. Bring anything substantial to a UK assay office if you intend to insure it: a Turkish mark is honest but it is not a British hallmark, and a UK insurer will want a valuation based on a test.

United Arab Emirates

Dubai's gold market runs on a strict system administered by Dubai Central Laboratory, and the enforcement is real: pieces are tested, the fineness is stamped, and traders in the Gold Souk face regular inspection. Twenty-two carat again dominates, with 21 carat, a standard almost unknown in Britain but the everyday choice across the Gulf, alongside it. Gold is sold at the posted daily rate plus workmanship, and the rate is displayed publicly rather than negotiated, so the only variable is the making charge. Two cautions for a British visitor. Twenty-one and 22 carat gold behaves very differently from 9 carat in daily wear, and the deep yellow that looks glorious under souk lighting reads differently under a grey sky at home. And anything you buy over the customs allowance is declarable on the way back, which is a duller conversation than the one you had at the counter.

Hallmark and Resale

If you ever want to sell a gold piece, the fineness determines the price.

Gold buyers. Buyers pay for the weight of pure gold in the piece, not the weight of the piece itself. A ring weighing 5 grams at 585 fineness = 5 x 0.585 = 2.925 grams of pure gold. The buyer pays for those 2.925 grams at the market price minus their margin (usually 10-20%).

The craftsmanship counts for nothing. However much the jeweller's work cost at purchase, at resale it is worth zero. The buyer purchases metal, not design.

Stones usually don't count. Cubic zirconia and crystals have no resale value. Natural diamonds do, but a buyer will value them significantly below retail price.

Conclusion. Jewellery is not an investment (unless it is antique or rare artisan work). Buy jewellery for pleasure, not for resale. If you want to invest in gold, buy bars or coins at 999 fineness.

Hallmark and Price: How to Calculate

The price of a precious metal piece consists of:

1. Metal cost at market price x weight x fineness. For example: gold costs X per gram. Ring weighs 5 grams. Fineness 585. Metal cost = X x 5 x 0.585.

2. Workmanship. Casting, polishing, stone setting, assembly. Usually 30-100% of the metal cost for mass production. 200-500% for artisan work.

3. Stones (if any). From pennies (CZ) to fortunes (natural diamonds).

4. Brand. The premium for a name. A luxury heritage jeweller sells a silver ring for the price at which an independent jeweller sells a gold one. You pay for the brand, consciously or not.

Practical tip. When buying gold by weight (common in Turkey, India, UAE), check: price per gram x weight x fineness = metal cost. Everything above that is workmanship and margin. If the margin exceeds 50% of the metal cost for a simple piece without stones, you are overpaying.

Exotic and Rare Metals

Palladium

Fineness 500 or 950. A platinum-group metal, cheaper than platinum but with similar properties: white, strong, hypoallergenic. Used as an alternative to white gold and platinum. Palladium hallmarking became compulsory in the UK in 2010.

Titanium

Not hallmarked (not a precious metal). But marked: "Ti," "Titanium," "Grade 1-5." Titanium is hypoallergenic, lightweight and incredibly strong. Drawback: cannot be soldered (a broken titanium ring cannot be repaired) and cannot be resized.

Tantalum

A dark blue-grey metal that has quietly taken a share of the men's wedding band market over the past decade. Marked simply "Tantalum" or "Ta", because like titanium and tungsten it is not a hallmarkable precious metal and no assay office will touch it. Its appeal is a genuinely unusual combination: it is almost as hard-wearing as tungsten but not brittle, so it dents rather than shatters, and unlike tungsten it can be cut off the finger in an accident and emergency department with ordinary tools. It is also biologically inert to a degree that surgeons rely on, which makes it a sensible choice for skin that reacts to nickel. The colour is its signature, a deep gunmetal that does not need plating and darkens slightly with wear. The drawback is the same as with all the industrial metals: it cannot be resized, so if your hands change with the seasons or the years, you are buying a new ring rather than altering the old one.

Tungsten Carbide

Marked "Tungsten" or "WC." Incredibly hard, virtually impossible to scratch. But brittle: it can shatter from a strong impact (unlike steel, which bends). Tungsten rings cannot be resized. And they cannot be cut with a standard ring cutter in an emergency, so a special tool is needed.

What to Buy: Fineness vs Material

For daily wear without maintenance: 316L stainless steel. No hallmark, no tarnish, no allergy, no stress. Put it on, forget it.

For daily wear with minimal maintenance: 925 silver with rhodium plating. Beautiful, accessible, needs a wipe once a week and rhodium re-plating every year or two.

For special pieces (engagement ring, anniversary gift): 585 or 750 gold. Does not tarnish, does not peel, retains value.

For the ultimate: 950 platinum. If budget allows and you want "forever" without caveats.

What to avoid: 375 gold (little gold, lots of allergens), unhallmarked "gold" pieces from bazaars (unpredictable composition), "jewellery steel" at silver prices (overpaying for marketing).

FAQ

How can I check the hallmark at home? Reliably, you can't. Home tests (magnet, vinegar, iodine) give approximate results. The only reliable method is XRF analysis at an assay office or jeweller. Costs little, takes minutes.

Can a hallmark be fake? Yes. Fake hallmarks are struck on counterfeits. But the quality of a fake hallmark is usually lower: blurred outlines, wrong shield shape, misaligned symbols. Compare with photos of genuine hallmarks published by the assay offices.

Why is there no hallmark on my piece? Possible reasons: the item is not precious metal (steel, brass, titanium are not hallmarked). Or it was made in a country without compulsory hallmarking. Or the hallmark wore off (happens on old pieces). Or the piece falls below the weight exemption threshold.

585 or 750: which is better? Depends on your priority. 585 is harder and cheaper. 750 is more beautiful in colour and more prestigious. For everyday wear, 585 is more practical. For special pieces, 750 is justified.

Can you wear 925 silver every day? Yes, but it will tarnish. Clean every 1-2 weeks. Or plate with rhodium and clean less often. Or switch to stainless steel, which does not tarnish at all.

What is "medical gold"? A marketing term. Usually means 316L stainless steel with gold plating or PVD coating. Contains no gold in meaningful quantities. Not a medical product. The name was invented for sales, not accuracy.

What does "vermeil" mean? Silver 925 coated with a layer of gold. Called vermeil if the gold layer is at least 2.5 microns thick and at least 10K fineness. Combines the look of gold with the affordability of silver. More in how long does gold plating last.

What does "EP" or "GP" on jewellery mean? EP = Electroplated. GP = Gold Plated. Both mean the item is not solid metal but coated with a thin layer. This is not a hallmark. It is a coating designation. The base metal may be brass, copper or steel.

What does "GF" on jewellery mean? GF = Gold Filled. The gold layer constitutes at least 5% of the total weight. Significantly thicker than GP (gold plated). Gold Filled lasts years and decades. Common in American jewellery. Not widely seen in the UK but increasingly available online.

What does "Nickel Free" on jewellery mean? It means the item contains no nickel or contains it below the EU REACH regulation limit (less than 0.5 micrograms per square centimetre per week). Important for allergy sufferers. But "Nickel Free" is the manufacturer's claim, not a government guarantee. Trust but verify, especially if the allergy is severe. More in nickel allergy guide.

Is 9 carat (375) worth buying? If budget is limited and you specifically want gold, 375 is better than plating (375 won't peel). But if the choice is between 375 gold and quality stainless steel, the steel is more practical, more durable and won't cause allergic reactions. The gold content in 375 is less than 40%, which many countries don't consider high enough to call "gold" at all.

What's the difference between a hallmark and a trademark? A hallmark is an independent verification of metal content, applied by an assay office. A trademark (or brand mark) is the manufacturer's own mark. A hallmark tells you what the metal is. A trademark tells you who made it. Both may appear on the same piece, but they serve different purposes. Only the hallmark is legally enforced as a guarantee of composition.

Why does my Zevira jewellery have no hallmark? Because Zevira jewellery is made from 316L stainless steel, which is not a precious metal and does not require hallmarking. This is not a deficiency. It is a different category. Stainless steel's value lies in its practical qualities (strength, hypoallergenicity, no tarnishing), not in the metal's per-gram cost.

What is the difference between assay and hallmarking? Assay is the process of testing the metal's composition. Hallmarking is the act of stamping the certified mark onto the piece. The assay office performs both: it tests (assays) the metal and then applies the hallmark. The two steps are inseparable in the British system.

I bought jewellery abroad: is the hallmark valid in the UK? It depends on where it was hallmarked. A piece from a Vienna Convention country (Austria, Sweden, Finland, Ireland, Netherlands, Switzerland, Portugal, Czech Republic) bears an internationally recognised mark and does not need re-hallmarking for personal use in the UK. For resale as precious metal in the UK, imported pieces must be hallmarked by a UK assay office.

Can I have an old piece re-hallmarked? Yes. Any of the four UK assay offices will test and hallmark an existing piece. The piece will be tested for its actual fineness, and if it meets a recognised standard, a fresh hallmark will be applied. If the actual fineness is lower than a previous mark suggested, the old mark may be removed.

What did the date letter on my antique ring look like, and when was it made? Each assay office published its own alphabet cycle with a specific font and shield shape. The London Assay Office, Birmingham Assay Office and Sheffield Assay Office all provide free online date letter guides. By identifying the assay office mark first, then matching the letter style and shield shape to the reference table, you can determine the year within the cycle. Most cycles run 20-25 years before starting again with a new font.

How to Verify a Hallmark: Step-by-Step

At Home

1. Take a jeweller's loupe or magnifying glass (10x magnification works best).
2. Look for marks on the inside of rings, on chain clasps, on earring posts, on bracelet clasps.
3. Note any symbols you see: the lion passant (silver), the crown (gold), any letters or numbers.
4. Compare what you find with the official hallmark guides published by the four UK assay offices (all available online).
5. If you cannot see any marks, the item may not be precious metal, may be exempt by weight, or the marks may have worn away.

At an Assay Office

Any of the four UK assay offices (London, Birmingham, Sheffield, Edinburgh) will test and hallmark jewellery for a fee. You can also have existing pieces verified. The process is straightforward: submit the piece, the office tests it and either confirms the existing hallmark or reveals the actual composition.

The Bottom Line

A hallmark is a jewellery passport. It tells the truth about composition when marketing may not. "Gold ring" could mean anything from 37.5% to 99.9% gold. "Ring hallmarked 750" is a specific composition, verified by an independent authority.

You do not need to be an expert gemmologist to understand hallmarks. The basics are enough: 925 = silver, 585 = 14K gold, 750 = 18K gold. Everything else is nuance, and now you know that too.

Three tiny marks on the inside of a ring are not decoration. They exist so you know what you are paying for. Read them. Understand them. And if they are absent, ask why. The answer to "why is there no hallmark" will tell you more about the seller than any advertisement.

About Zevira

Zevira makes jewellery in the artisan tradition of Albacete, Spain. Every precious metal piece we produce passes through the Spanish assay system and carries its proper mark: 925 for silver, 585 or 750 for gold. No "silver tone," no "silver-look plating" hiding behind a vague label. If a piece is steel, we say so. If it is gold, the hallmark proves it.

Here is what you will find with us:

• Silver 925 carrying the mark of the Spanish guarantee office
• Gold 585 (14K) and 750 (18K) with the official fineness stamp
• 316L stainless steel with a manufacturer's certificate
• Clear material labelling on the tag and in every product description
• Personal engraving placed next to the hallmark

Each piece is made by hand, with the option of personal engraving. We work with sterling silver and 14-18K gold, and we put the mark where you can read it.

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