Hallmark Translator
A piece's purity is the same everywhere — 18-carat gold is 75% gold in every country. What changes is the mark struck on it, the name it's given, and whether an independent office tested it. Pick what you've got and where you're headed, and this shows you the rest.
United Kingdom
Independent assay
18-carat750 · 75% gold
Independently tested by an assay office before sale.
Look for
- Leopard's Head
- Anchor
- Rose
- Three-towered Castle
Which countries share each standard
Gold standards, side by side
Fineness (parts per thousand) is the universal measure — the translator pivots on it. Where a grade you know isn't a recognised standard in another country, it shows the nearest one rather than a false match.
The Hallmark Translator is free to use in this browser, with no account or download required.
A reference guide, not an authentication service. Marks and standards vary by date and metal; consult the relevant assay office or standards body for definitive identification. Where a country page flags an uncertain legal basis or historic mark, that caveat also applies to translator output.
- Hallmarking guidance notes Verified
- Precious metal control of watch cases Verified
- Country profile: Switzerland Verified
- Metalli preziosi Verified
- Metalli preziosi Verified
- Hallmarking FAQ Verified
- 16 CFR Part 23 - Jewelry Guides Verified
- What is the meaning of the karat mark on gold jewelry? Verified
- GB 11887-2012: Jewellery - Fineness of precious metal alloys and designation Verified
- Gold and platinum marking requirements Verified
- Hallmarks list Verified
- Fineness certification of precious metal wares Verified
- Gesetz über den Feingehalt der Gold- und Silberwaren Verified
- The Precious Metals Book Verified
- Hallmarking legislation FAQ Verified
- Analysis and assay-house services Verified
- Decree 32 on the Protection of the Value of Turkish Currency Verified
- Gem and jewelry testing services Verified
- Thai Industrial Standards catalogue Verified
- Korean Industrial Standards Verified
- KS D ISO 9202 Verified
- Country profile: Israel Verified
- Jewels and metals Verified
- Bijuterias e joias Verified