Hallmark fineness marks explained
Every fineness mark the UK Hallmarking Act 1973 recognises for gold, silver, platinum and palladium: the figures struck on the piece and how much precious metal they guarantee. Carat equivalents are the fineness times 24, divided by 1,000.
| Hallmark | Figures struck | Metal | Precious metal content | Gold carat equivalent |
|---|---|---|---|---|
| 375 gold | 375 | Gold | 37.5% gold | 9.0 carat |
| 585 gold | 585 | Gold | 58.5% gold | 14.0 carat |
| 750 gold | 750 | Gold | 75% gold | 18.0 carat |
| 916 gold | 916 | Gold | 91.66% gold | 22.0 carat |
| 990 gold | 990 | Gold | 99% gold | 23.8 carat |
| 999 gold | 999 | Gold | 99.9% gold | 24.0 carat |
| 800 silver | 800 | Silver | 80% silver | |
| 925 silver | 925 | Silver | 92.5% silver | |
| 958 silver | 958 | Silver | 95.84% silver | |
| 999 silver | 999 | Silver | 99.9% silver | |
| 850 platinum | 850 | Platinum | 85% platinum | |
| 900 platinum | 900 | Platinum | 90% platinum | |
| 950 platinum | 950 | Platinum | 95% platinum | |
| 999 platinum | 999 | Platinum | 99.9% platinum | |
| 500 palladium | 500 | Palladium | 50% palladium | |
| 950 palladium | 950 | Palladium | 95% palladium | |
| 999 palladium | 999 | Palladium | 99.9% palladium |
Related
- 375 gold hallmark: what it means
- 585 gold hallmark: what it means
- 750 gold hallmark: what it means
- 916 gold hallmark: what it means
- 990 gold hallmark: what it means
- 999 gold hallmark: what it means
- 800 silver hallmark: what it means
- 925 silver hallmark: what it means
- 958 silver hallmark: what it means
- 999 silver hallmark: what it means
- 850 platinum hallmark: what it means
- 900 platinum hallmark: what it means
- 950 platinum hallmark: what it means
- 999 platinum hallmark: what it means
- 500 palladium hallmark: what it means
- 950 palladium hallmark: what it means
- 999 palladium hallmark: what it means