Hallmarks for Charity Volunteers: The 5-Minute Skill That Stops You Giving Money Away

If a charity shop volunteer learns only one new skill this year, it should be this one. Reading a hallmark takes about five minutes to learn and a few seconds to use, and it is the difference between a piece of jewellery being priced at a pound on the rail or recognised as solid gold worth far more for the cause.

A hallmark is a tiny official stamp that tells you what a piece is made of. It is not a secret and it is not a jeweller's mystery - it is a public system designed to be read. This guide teaches charity volunteers, in plain English, how to find hallmarks, what the numbers mean, and - just as importantly - how to spot the markings that look valuable but mean "plated", not solid. No equipment, no jargon, no experience needed.

What a hallmark actually is

For centuries, precious metal sold in Britain has had to be independently tested and stamped to prove its purity. That stamp is the hallmark. It exists to protect buyers from being sold plated or under-purity metal as the real thing. It is, in effect, an official guarantee struck into the metal itself.

For a charity shop, that history is a gift. It means the most important question about a piece of jewellery - is it solid precious metal? - has often already been answered, by an assay office, and the answer is stamped on the item waiting to be read. You do not have to test it. You have to find the stamp and understand it.

Why this is the most valuable skill in the shop

Charity shops price most things by appearance. Appearance is a poor guide to precious metal. A bright, sparkly brooch can be worthless costume; a plain, dull, scratched band can be solid 18 carat gold. The eye gets it wrong constantly.

The hallmark cuts straight through the guesswork. A volunteer who can find and read a hallmark is no longer guessing - they have hard evidence about what a piece is made of. That is why this single skill protects more charity income than almost anything else you could teach. It moves jewellery pricing from "looks nice" to "is actually gold".

Where hallmarks hide

Hallmarks are deliberately placed where they will not spoil the look of a worn piece, which means they are small and tucked away. Train your eye to these spots:

• Rings - inside the band, on the inner surface.
• Chains and bracelets - on the clasp, on the catch, or on a flat link or small tag near the clasp.
• Earrings - on the post, the hook, the clip or the butterfly back.
• Pendants and lockets - on the bail (the loop the chain runs through) or around the edge.
• Brooches - on the back of the body or near the pin fitting.
• Watches - on the case back, inside the case, or on the lugs.

The marks are tiny. A cheap jeweller's loupe or magnifier - the kind that costs a couple of pounds - or your phone camera zoomed in, makes all the difference. Keep one on the sorting table permanently.

The numbers that matter

Modern hallmarks use a three-digit number that states purity as parts per thousand. This is the heart of the skill. Learn this table and you have learned most of what you need.

You may also see older "carat" stamps - 9ct, 14ct, 18ct, 22ct - which mean the same as 375, 585, 750 and 916. If you see any of these numbers, you are very likely holding solid precious metal, and the piece should be set aside for the GoldPaid box.

The pictures next to the numbers

A full British hallmark is more than a number. Alongside the purity figure you may see small pictorial marks: a symbol for the assay office that tested the piece (for example a leopard's head, an anchor, a castle or a rose), a standard mark confirming the metal type, and a date letter showing the year it was assayed. You do not need to memorise these. Just know that the presence of these small official-looking symbols, grouped with a purity number, is a strong sign you are holding a properly assayed precious-metal item. If you want to identify a date letter or office mark precisely, photograph it and ask - it is not something a volunteer needs to carry in their head.

The markings that look valuable but are not

This section is just as important as the numbers, because the most expensive hallmark mistake is the opposite one - treating a plated item as solid. Plated and gold-filled items carry their own markings, and once you know them you will never be fooled.

The key rule: any extra letters around a number usually mean trouble for value. "750" on its own points to solid 18 carat gold. "750 GP" or "18K GP" points to plating. A number alone is the friend; a number with "GP", "GF", "RGP" or similar letters is the warning. And "EPNS", however heavy and silvery a canteen of cutlery looks, is not silver.

This does not mean plated and filled items are rubbish - gold-filled in particular contains a real, if small, amount of gold, and GoldPaid will assess it honestly. It means you should not price a plated brooch as if it were solid gold, and you should not assume a marked item is automatically solid without reading the whole mark.

When there is no mark at all

An unmarked item is one of the most misjudged things on the sorting table, so be clear on this. No hallmark does not mean no value. Plenty of solid precious metal carries no readable mark - older pieces, handmade pieces, foreign pieces that used a different system, items where the mark has simply worn away, or small items that were never marked. Equally, a piece with the right number is not guaranteed solid until it has been properly inspected.

This is the honest limit of hallmark reading, and it is why the skill points towards a box, not a final price. A hallmark is powerful evidence, not a courtroom verdict. The safe rule for volunteers: a hallmark you recognise means "definitely set this aside"; no hallmark, an unfamiliar mark, or surprising weight means "still set it aside, and let it be checked". Hallmarks help you catch value. GoldPaid's inspection confirms it.

The five-minute drill

Here is the whole skill, condensed into a routine any volunteer can run in seconds:

1. Pick up the piece and find the mark. Check the ring band, clasp, earring fitting, pendant bail or watch case back.
2. Magnify it. Use a loupe or phone zoom - the marks are small.
3. Read the number. 375, 585, 750, 916, 925, 958 and similar mean likely solid precious metal.
4. Check for warning letters. GP, GEP, RGP, GF, HGE, EPNS, EP - these mean plated or filled.
5. Decide the destination. Recognised purity number, or no mark but heavy and uncertain - it goes in the GoldPaid box. Clear plating marks and lightweight - it can go to the costume rail.

That is it. Five steps, a few seconds, no expertise.

Teaching the whole team

A skill held by one volunteer is fragile. The aim is for every person who touches the sorting table to be able to run the five-minute drill. Print the two tables in this guide and pin them above the sorting table. Add hallmark reading to your volunteer induction. Keep magnifiers permanently on the table. And use GoldPaid's free training as the proper grounding, then let the printed tables keep it fresh. When the whole team can read a mark, the charity stops depending on luck.

What to do once you've found a mark

Finding a hallmark is the start, not the finish. A recognised mark means the piece goes into the GoldPaid box with the rest of the precious metal. When the box is ready, photograph the contents - including close-ups of the marks you found - and message GoldPaid for a free prepaid label. GoldPaid confirms purity properly on inspection, weighs everything, accounts for stones and non-precious parts, and returns an itemised, no-obligation valuation. If the charity accepts, payment goes by bank transfer; if it declines, the items return. Royal Mail cover may be available up to GBP 2,500 depending on the postal method and cover level used, and GoldPaid can confirm the right postal option before you post.

Date letters and assay offices, a little deeper

Volunteers do not need to memorise these, but a little understanding makes the pictorial part of a hallmark far less mysterious. A traditional British hallmark is a small group of marks struck together. Alongside the purity number sits a town mark showing which assay office tested the piece - the four offices operating today use a leopard's head for London, an anchor for Birmingham, a rose for Sheffield and a castle for Edinburgh, and older pieces may carry the marks of offices now closed. There is usually a standard mark confirming the metal - a lion for sterling silver, for example. And there is a date letter: a single letter, in a particular style and shield shape, that records the year the piece was assayed. The date letter is how the trade can tell when a piece was made. A volunteer does not need to decode it - that is a job for a reference chart or a quick photo to GoldPaid - but recognising that a small letter grouped with the other marks is a date letter, not a random scratch, is useful. The presence of this whole cluster of official marks, struck neatly together, is itself a strong sign you are holding a properly assayed precious-metal piece.

Foreign, import and convention marks

Plenty of jewellery donated to British charity shops was made abroad, and foreign pieces follow different systems. Some carry a three-digit purity number you will recognise from the table above, which makes life easy. Others use systems that look unfamiliar. European pieces often use the number 800 for a lower-grade silver, and continental gold may be marked in ways that do not match British carat conventions. You may also see import marks - special marks applied when a foreign-made precious-metal item was brought into Britain and assayed here - and common control marks, an internationally recognised mark shaped like a balance or set of scales with a number, used by countries that signed an international hallmarking convention. The practical point for a volunteer is simple. You are not expected to identify every foreign system. You are expected to recognise that an unfamiliar but official-looking mark, especially one with a purity number, is a reason to set a piece aside for checking, not a reason to dismiss it. Foreign marks confuse; they should never be allowed to condemn a piece to the bin.

Worn, partial and rubbed marks

Hallmarks are struck into soft precious metal, and precious metal gets worn. A ring worn daily for forty years may have a hallmark that is faint, partly rubbed away, or reduced to a ghost of its original shape. This is one of the commonest real-world situations and it is worth a clear word. A worn mark is not a fake mark and it is not an absent mark - it is evidence that has faded, and faded evidence still counts. If you can make out part of a mark - a number you are fairly sure of, the shape of a town mark, even just the sense that something official was once struck there - treat the piece as a likely precious-metal item and box it. Use angled light and a magnifier; tilting a piece so light rakes across the surface often makes a worn mark readable when straight-on light does not. And if a mark is too far gone to read at all, fall back on the other evidence - weight, colour, wear-through, the piece's overall character. A mark you cannot quite read is a reason to check, never a reason to give up.

Build a reference board and practise on known pieces

A skill improves with practice, and hallmark reading is no exception. Two simple things turn a one-off lesson into lasting competence. First, build a small reference board for the back room. Print the two tables from this guide large and clear, and - over time - add a few real example pieces the shop has identified, or good clear photographs of marks, labelled with what they are. Seeing "this is what a real 375 looks like, this is what a GP mark looks like" next to the tables makes the printed numbers concrete. Second, practise on known pieces. When GoldPaid's training visits, or when a valuation comes back confirming what items were, use those confirmed pieces as teaching examples before they leave. Have volunteers find and read the marks on items already identified, so they are calibrating their eye against known answers. A team that has handled a dozen confirmed hallmarks reads the next one with real confidence. A team that has only ever read the theory hesitates. The board and the practice cost almost nothing, and they are what make the five-minute skill genuinely permanent.

Platinum and palladium: the marks people overlook

Gold and silver get all the attention, and as a result platinum and palladium - both genuine precious metals, and platinum a particularly valuable one - quietly slip past charity sorting tables. The problem is colour. Platinum, white gold and even good costume metal can all look like a similar pale, silvery white, so a platinum ring is easily misread as silver, as white gold, or as costume, and priced accordingly. The defence is the same as for everything else in this guide: do not judge by colour, read the mark. Platinum is marked with its own purity numbers - commonly 950, and also 850, 900 and 999 - and often with the word "PLAT" or "PLATINUM", or a small pictorial mark. Palladium, increasingly used in jewellery, is marked 500 or 950 and sometimes with its name. If you see any of these on a pale, white-coloured piece, you are very probably holding a precious metal that is easy to under-value and should go straight in the box. A heavy white ring with a "950" and "PLAT" mark is not a silver ring and should never be priced as one. Add platinum and palladium marks to your reference board alongside the gold and silver numbers, and brief volunteers that "silver-coloured" is a description, not an identification. The pale precious metals are the ones a charity is most likely to give away by mistake, precisely because nobody is looking for them.

Common hallmark mistakes

1. Not looking at all. The commonest mistake is never checking. Make it routine.
2. Reading "GP" or "GF" as solid gold. Extra letters mean plated or filled.
3. Treating EPNS as silver. It is nickel silver, electroplated - not silver.
4. Binning unmarked items. No mark is not no value.
5. Trusting a mark as final proof. A mark is strong evidence; inspection confirms it.
6. Letting one person hold the skill. Train the whole team and pin up the tables.

Your next step

Print the two tables in this guide and pin them above your sorting table today. Put a magnifier next to them. Brief the team on the five-minute drill, and ask GoldPaid to arrange free hands-on training so the skill is grounded properly. From that point on, your shop is reading evidence instead of guessing - and evidence keeps far more money for your cause.