The Goldsmiths’ Company Assay Office is where hallmarking began.

Their unparalleled reputation for excellence has been built since 1300 when we first began testing and hallmarking precious metals.

We have built our hallmarking expertise over 700 years, and the combined experience of our teams is second to none.

As part of the Goldsmiths' Company - one of the Great XII Livery Companies in London - our aim is to support, uphold and perpetuate the trade.