Hallmark 585
What does a 585 hallmark mean?
585 means 58.5% pure gold, sold as 14ct. A gram of it is worth £55.31 in metal today and we pay £48.67 (14 Nov 2026, 03:28).
Gold value
£55.31/g
We pay
£48.67/g
The number is parts per thousand
Fineness marks state how many parts in a thousand are the precious metal. 585 is 585 parts in 1,000, so 58.5% of the weight is gold and the rest is the alloy that gives the piece its colour and hardness. In carats that is 14ct: a carat is one twenty-fourth, and 14/24 is 58.5%.
585 gold by weight today
| Weight | Pure gold | Metal value | We pay |
|---|---|---|---|
| 1 g | 0.58 g | £55.31 | £48.67 |
| 5 g | 2.92 g | £276.53 | £243.35 |
| 10 g | 5.85 g | £553.07 | £486.70 |
| 20 g | 11.70 g | £1,106.14 | £973.40 |
| 50 g | 29.25 g | £2,765.35 | £2,433.51 |
Is it real? Three quick checks
- Look for company. A genuine UK hallmark has the fineness number inside a shaped outline, plus a sponsor's mark and an Assay Office mark. A lone number with nothing beside it is a claim, not a hallmark.
- Watch for plating codes. GP, GEP, HGE, RG or a fraction like 1/20 12K mean a thin layer of gold over base metal. These are worth very little as scrap.
- Check with a magnet. Gold, silver and platinum are not magnetic. A pull towards the magnet means a steel or nickel core.
None of these replaces a test. We check every piece with an XRF analyser before we make an offer, so you are paid for what the metal actually is, marked or not.
Instant estimate
Live ratesYou get
£486.70
Indicative, for hallmarked items. Final offer confirmed after testing. Several items?
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