Hallmarking in the uk

What does your mark mean?

PURITY MARK METAL TYPE What do the numbers mean?

925 Sterling Silver

999 Fine Silver (as in most metal clays)

375 9ct Gold

585 14ct Gold

750 18ct Gold

A complete hallmark consists of three punch marks:

Sponsor's mark (your mark or the manufacturers mark)

Metal and fineness (purity) mark

Assay office mark (London, Birmingham, Sheffield or Edinburgh)

Sometimes there are other marks applied such as a date mark but these are not a legal requirement.

In the UK, any person that sells precious metals must display on their

premises (including pop ups) in a conspicuous position, or on their

website a Hallmarking Act 1973 notice as approved by the British

Hallmarking Council.

Currently, all Silver items over the weight of 7.78g, and any gold items over the weight of 1g must be hallmarked by law.