UK hallmarking explained
The Hallmarking Act 1973, the four assay offices, exemption weights and date letters.
Typical UK second-hand price
Fully hallmarked pieces resell more easily and at better prices
What a UK hallmark contains
- Sponsor's mark — the maker or importer.
- Fineness mark — e.g. 375, 750, 925, 950.
- Assay office mark.
- Optional: traditional fineness symbol and date letter.
The four UK assay offices
| Office | Mark |
|---|---|
| London | Leopard's head |
| Birmingham | Anchor |
| Sheffield | Yorkshire rose |
| Edinburgh | Castle |
Exemption weights
| Metal | Must be hallmarked if over |
|---|---|
| Gold | 1g |
| Silver | 7.78g |
| Platinum | 0.5g |
| Palladium | 1g |
Before you buy
- Unmarked pieces over the exemption weight can only be sold as scrap or 'unmarked metal'.
- Have any high-value piece checked by an independent valuer or jeweller before paying. JewelleryTrader does not authenticate items.
Frequently asked questions
Can I sell unhallmarked gold?
Only as scrap or unmarked metal if it's over the exemption weight — not described as gold jewellery.
More gold, platinum & silver guides
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