LondonAssayOffice

The Goldsmiths’ Company Assay Office is where hallmarking began, and we have been testing and hallmarking precious metals for over 700 years.

We have been responsible for guaranteeing the purity of items made of precious metals since 1300, when the hallmarking statute was passed.

We became the official ‘home of hallmarking’ in 1478, establishing the country’s first Assay Office at Goldsmiths’ Hall London, which still operates today.