UK gold stamp and purity guide
Gold hallmark lookup UK
Enter or compare gold stamps such as 375, 585, 750, 916 and 999 to identify carat, purity percentage and estimated GBP melt value per gram.
Hallmark lookup
Type a UK hallmark like 375, 750, 916 or 999
Gold hallmarks usually show parts per thousand. A 375 stamp means 9ct gold, while 750 means 18ct gold.
Result
585 = 14K
58.3% pure gold
Melt value / gram
£57.68
Popular everyday jewelry in the United States.
View 14K gold price →| Stamp | Karat | Purity | Melt value / gram | Typical use |
|---|---|---|---|---|
| 9999 | 24K | 100.0% | £98.93 | Vietnamese four-nines fine gold standard often used for high-purity rings, bars, and local retail references. |
| 999 | 24K | 99.9% | £98.84 | 24ct fine gold bullion and pure-gold products. |
| 965 | 23K | 96.5% | £95.48 | Thai 96.5% gold standard used for domestic bars and jewelry. |
| 958 | 23K | 95.8% | £94.78 | High-purity jewelry and regional bullion standards. |
| 916 | 22K | 91.6% | £90.63 | 22ct high-purity jewellery, common in Asian jewellery markets. |
| 875 | 21K | 87.5% | £86.57 | Traditional high-karat jewelry in some Middle Eastern markets. |
| 800 | 19.2K | 80.0% | £79.15 | Portuguese 800 gold standard and some European jewelry. |
| 750 | 18K | 75.0% | £74.21 | 18ct fine jewellery, rings and watches. |
| 585 | 14K | 58.3% | £57.68 | Popular everyday jewelry in the United States. |
| 417 | 10K | 41.7% | £41.26 | Affordable and durable jewelry; minimum US karat sold as gold. |
| 375 | 9K | 37.5% | £37.10 | Very common 9ct UK everyday jewellery. |
| 333 | 8K | 33.3% | £32.95 | Common in Germany and some European jewelry markets. |
UK hallmark value reference
Use the table to connect a hallmark to carat, purity and current GBP melt value per gram.
| Hallmark | Carat | Value per gram | Common use |
|---|---|---|---|
| 999 | 24ct | £98.84 | Fine gold bullion, bars and some coins |
| 916 | 22ct | £90.63 | High-purity Asian jewellery and some coins |
| 750 | 18ct | £74.21 | Fine jewellery, watch cases and premium rings |
| 585 | 14ct | £57.68 | 585 jewellery, imported rings and chains |
| 417 | 10ct | £41.26 | 417 imported jewellery and durable low-carat pieces |
| 375 | 9ct | £37.10 | Common UK everyday jewellery and scrap gold |
| 333 | 8ct | £32.95 | 333 European jewellery and lower-carat pieces |
How to use a UK gold hallmark lookup
A gold hallmark lookup UK should help with a practical valuation problem. Before using a scrap gold calculator or asking for cash-for-gold quotes, you need to know whether an item is 9ct, 18ct, 22ct or 24ct. The hallmark connects the visible stamp to a purity percentage.
The stamp 375 means 9ct and is very common in UK jewellery. The stamp 750 means 18ct, often seen on fine jewellery. The stamp 916 means 22ct and is common in high-purity Asian jewellery. The stamp 999 means fine gold, usually bullion or very high-purity pieces.
Why hallmark and weight must be checked together
A hallmark alone is not the value. Weight and purity work together. Ten grams of 375 gold has much less pure gold than ten grams of 750 gold. That is why a buyer quote should show both the weight and the purity used in the calculation.
If the hallmark is damaged, missing or suspicious, do not guess on a valuable item. A proper test can prevent overvaluing plated items or undervaluing solid gold. Gold-plated and rolled-gold marks should not be priced as solid gold hallmarks.
When hallmark value is not the final selling price
The value shown here is melt value. It does not include designer value, antique value, gemstone value or coin premium. It also does not guarantee a buyer payout. Use it to understand the metal baseline, then compare buyer offers or appraisals.
For UK sellers, hallmark lookup is usually the step before a calculator. Once you know whether the item is 375, 585, 750, 916 or 999, you can move to the matching price page or add the item to the scrap calculator. That avoids the common mistake of pricing every piece as 24ct or accepting a quote without knowing which purity the buyer used.
Marks that need extra care
Imported jewellery, older repairs and worn rings can carry marks that are hard to read. If the piece has GP, GEP, RGP, GF or plate-related wording, it should not be treated as solid hallmarked gold. If the mark is partly missing, compare it with the item colour, weight, wear pattern and a professional test before using a high melt value.
Some UK items also carry maker marks, assay office symbols and date letters. Those marks can be useful for identification, but the purity number is what drives the melt calculation. If the item looks antique or branded, check resale value before assuming scrap is the best route.
How to check a small or worn stamp
Use bright light, a phone macro photo or a jeweller's loupe before entering the mark. A worn 375 can be mistaken for another number, and a tiny plating mark can be missed on chains or clasps. If the stamp is unclear, treat the lookup result as a starting point and ask for testing before using the value in a sale.
Hallmark workflow
Use the stamp before the scale
Read the number
Use 375, 585, 750, 916 or 999 to pick the right UK price row.
Reject plated marks
GP, RGP, GEP and GF should not be valued as solid hallmarked gold.
Then weigh the item
After purity is known, use net gold weight to estimate GBP melt value.
Scrap gold calculator UK
Use the hallmark before adding each item.
Gold price per gram UK
Compare all UK hallmark values in GBP.
Gold hallmark lookup UK FAQ
What does 375 mean on UK gold?
375 means the item is about 37.5% pure gold, commonly called 9ct gold. It is one of the most common purities for UK everyday jewellery.
What does 750 mean on jewellery?
750 means the item is 75% pure gold, commonly called 18ct gold. It is common on fine jewellery, rings, chains and watch cases.
What does 916 mean on UK gold?
916 means about 91.6% pure gold, commonly called 22ct gold. It appears often in Asian jewellery communities and high-purity pieces.
What does 999 mean on gold?
999 means fine gold or approximately 99.9% pure gold. It is most often associated with bullion bars, coins and high-purity investment gold.
Can a UK gold hallmark be fake or wrong?
A stamp is useful, but it is not absolute proof. Worn, fake, imported or repaired items may need acid testing, electronic testing or XRF testing before a valuable sale.
What do GP, GEP, RGP or GF mean?
These marks usually refer to plated, electroplated, rolled gold or gold-filled items. They are not valued the same as solid hallmarked gold.
Should I sell hallmarked jewellery as scrap?
Use melt value as a baseline, but check for designer, antique, coin or gemstone value first. Some items are worth more than scrap.
Which hallmark matters most for a cash-for-gold quote?
The purity hallmark matters most: 375, 585, 750, 916 or 999. A buyer also checks weight, testing result and payout percentage.
What if my jewellery has letters as well as numbers?
Letters can be maker marks, assay office marks, date letters or plating marks. The purity number still drives the melt value, but unusual marks are worth checking with a jeweller if the item may have extra value.