A hallmark means that the item has been independently tested and guarantees that it conforms to all legal standard of purity (fineness).
Only an Assay Office can carry out these tests, there are four in the UK- London, Birmingham, Sheffield and Edinburgh.
The UK hallmark comprises three compulsory symbols:
Sponsor’s or Maker’s Mark – This indicates the maker or sponsor of the article. No two marks are the same.
Metal or Fineness Mark – These show the standard of the fineness – the purity of the precious metal, in parts per thousand.
Since 1999, all purities are indicated by a millesimal number, eg 375 is 9 carat gold and this means there are 375 parts of pure gold out of 1000 parts. This number is contained in a shield depicting the precious metal
Assay Office Mark – Indicates the Assay Office at which the item was tested and marked.
Until 1999 it was compulsory to mark a date letter indicating the year of hallmarking.
It can now be applied voluntarily in addition to the compulsory mark.
All London Road Jewellery bears a hallmark to ensure quality and confidence.