Updated
A crown beside a number is the traditional British mark for gold. The number gives the purity: 375 is 9 carat, 585 is 14 carat, 750 is 18 carat and 916 is 22 carat.
| Beside the crown | Means | Melt per gram |
|---|---|---|
375 | 9 carat gold | $48.90 |
585 | 14 carat gold | $76.28 |
750 | 18 carat gold | $97.79 |
916 | 22 carat gold | $119.44 |
Melt in US dollars.
On older silver, a crown can be the town mark of the Sheffield Assay Office, which now uses a rose. A crown beside a lion passant points to Sheffield sterling silver, not gold.
Traditional symbols became optional on 1 January 1999, so newer UK gold may show only the fineness number, with the sponsor's mark and an assay office mark. That is still a full UK hallmark.
Melt value = weight in grams × purity × spot price per gram
Spot prices are quoted per troy ounce, and a troy ounce is 31.1035 grams. Gold spot is $4,055.57, so pure gold is $130.39 a gram.
5 grams of 9 carat gold: 5 × 0.375 × $130.39 = $244.48
Values are in US dollars. Melt values as of 2026-11-09, from spot prices of gold $4,055.57, silver $51.62 and platinum $1,533.98 per troy ounce.
Photograph it, then take a close-up of the stamp. GemstoneAI uses a legible stamp for the metal and gives a first read on what you have and what it may be worth. Your first scan is free.
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Sources: Hallmarking Act 1973, Schedule 2 and the British Hallmarking Council's hallmarking guidance notes.
In a UK hallmark, a crown beside a number such as 375 or 750 is the traditional mark for gold. On older silver, a crown beside a lion passant is the Sheffield town mark instead.
9 carat gold, 37.5% pure, hallmarked in the UK.