More than 245 years in business

Providing a number of services from Hallmarking, Laser Etching and Mark Identification...

Experts in Hallmarking

The oldest form of consumer protection, the history of the hallmark dates back as far 1300...

A range of Analytical Services

Precious metals have been analysed and hallmarked for well over 200 years...

Coronavirus (COVID-19) Information

From Saturday 24th October, South Yorkshire will be in COVID Tier 3, but Sheffield Assay Office will remain open and we will continue to offer our customers a first class service.

Whilst the restrictions do not prevent us from opening, we are seeing more staff having to self isolate as a result of Track and Trace, which will inevitably affect our daily rate of production.

With immediate effect, and until further notice, our Early Hall and One Hour Service is being suspended.

We hope you all remain safe and well, and thank you for your understanding during these difficult times.

Hallmarking »


In an age where consumer protection and rights are a key concern for most present-day manufacturers it is fascinating to note that the hallmark is, in fact, one of the oldest forms of consumer protection that exists. The history of the hallmark dates back as far 1300.

» More about Hallmarking

Analytical Services »

Analytical Services

We offer a range of additional analytical services from metal and mineral analysis, to mercury screening and environmental testing. Sheffield Assay Office was the first UK Assay Office to be awarded UKAS accreditation and is proud to have retained that accreditation for 32 years.

» More about Analytical Services