what is a hallmark?

You’ve probably heard of the term “hallmark” in relation to jewellery products, but we know that sometimes it can be a little confusing. Here’s everything you need to know!

There are four Assay Offices in the UK (Edinburgh, London, Birmingham, Sheffield). At jewellerybox, we work with the Edinburgh Assay Office (external link) to ensure that all of our jewellery is meeting the requirements that we expect, therefore meaning we can meet your expectations. Not all products that are Sterling Silver or 9ct Gold will be hallmarked however, this is based on the weight of the item.

What is a hallmark?

  • Consists of a series of marks applied to things made from precious metals. In our case, this means our Silver & Gold items
  • It verifies that the item of jewellery has been independently tested by the Assay Office, to ensure that it meets all legal standards of purity
  • Also, it tells you where the piece was hallmarked, what the article is made from/the fineness of the metal, and sometimes what year the article was hallmarked. There will always be a company mark in a hallmark too

When should an item be hallmarked?

It is a legal requirement that all .925 Sterling Silver items over 7.78 g and all 9ct Gold items over 1 gram need to have a full UK hallmark. You may notice that some of our items have a 925 or 375 stamp. Stamps such as “925” and “375” are applied by some manufacturers, and although indicative of the metal purity, are not full UK hallmarks. A lot of our jewellery is stamped rather than hallmarked, as the majority of our pieces are quite dainty and light, and therefore do not meet the requirement for a hallmark.

We try to keep our stamps and hallmarks pretty small so that they do not affect the look of the jewellery, so you might have to look closely to see it!

We hope this explains hallmarks, but do get in touch with our Customer Service team if you have any more questions.

Daena