Sheffield Assay Office

Hallmarking ● Analytical Services ● Diamond Verification Service

Sheffield Assay Office has been part of Sheffield’s industrial and manufacturing heritage since 1773, when local silversmiths successfully petitioned Parliament for the right to assay precious metals in the city. This moment helped establish Sheffield as a centre for quality, craftsmanship and independent verification — principles that continue to underpin the organisation’s work today.

Assaying provides an independent test and verification of precious metal content, offering confidence in quality, accuracy and integrity. For over two centuries, Sheffield Assay Office has played an important role in supporting makers, protecting consumers and upholding standards within the precious metals industry.

Jewellery and items of precious metal continue to be hallmarked at Sheffield Assay Office and carry the distinctive Sheffield Town Mark, recognised in the UK and internationally. Alongside this historic function, the organisation has evolved to respond to the changing needs of industry and society.

Today, Sheffield Assay Office also delivers specialist analytical and testing services to customers across a broad range of sectors, including jewellery, engineering, manufacturing, technology and advanced materials. Through advanced scientific techniques and modern laboratory facilities, it supports product development, research and innovation while maintaining rigorous standards of independence and accuracy.

Combining centuries of expertise with modern scientific capability, Sheffield Assay Office remains a trusted authority with strong roots in Sheffield’s industrial legacy and a reputation that extends well beyond the city.

Sheffield Assay Office
Guardians’ Hall
Beulah Road
Hillsborough
Sheffield S6 2AN

Tel: +44 (0) 114 231 2121   www.assayoffice.co.uk