Why Do We Hallmark?

At The Small Jewellery Co (TSJCo), we believe every piece of jewellery should come with trust and transparency — that’s why we hallmark.

In the UK, a hallmark is your official guarantee of purity and authenticity. It means your gold, silver, or platinum has been tested and certified by one of the UK’s trusted Assay Offices — in London, Birmingham, Sheffield, or Edinburgh.

Every hallmark confirms your jewellery is exactly as described, whether it’s 18ct gold or sterling silver. It protects you from imitations, builds confidence, and even helps with resale or insurance value later on.

So when you buy from us, you can wear your jewellery with confidence — because at TSJCo, every hallmark tells a story of quality and care.