Sheffield Assay Office

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Sheffield Assay Office More than 250 years in business providing specialist Hallmarking, Analytical & Diamond Verification Services Our process is also fully RJC/BSI/ISO accredited.

The Sheffield Assay Office attracts customers from all over the world and the business has evolved to meet the demands of society and industry. Jewellery and items of precious metal are still assayed in their millions each year and bear the distinctive Sheffield 'Town' mark. The Sheffield Assay office now has a world-wide reputation in other arenas too, particularly in cutting-edge analytical services. Hallmarking is the oldest form of consumer protection, dating back as far as 1300. When a statute of Edward I established the assay (test and analysis) and marking for precious metals, with the aim of protecting the public against fraud and the trader against unfair competition. http://www.assayoffice.co.uk/our-services

Sheffield Analytical Services is a division of the Assay Office and, although grown from a business rooted in history, remains at the cutting edge of technology and innovation. Our superbly equipped laboratories and high qualified personnel are widely acknowledged for both the range of testing and analysis procedures and their impressive expertise - which has resulted in Analytical Services being one of the first UK laboratories to be awarded UKAS accreditation to ISO 17025 standard. An accreditation which has been retained for 38 years - a considerable achievement given that the rigorous assessment is carried out every year. http://www.assayoffice.co.uk/analytical-services

Diamond Verification Services (DVS) offers a set diamond service: a diamond jewellery testing service designed to verify that all diamonds within your jewellery are natural. As the number of lab-grown diamonds in the market continues to soar, we recognised an urgent need for retailers, and consumers alike, to have access to a fully independent, specialist service that can accurately identify the presence of natural or lab-grown/synthetic diamonds. https://www.diamondverificationservices.co.uk/

💍 What’s really in your jewellery? We’re proud to have supported the BBC’s investigation into toxic jewellery, featured ...
22/10/2026

💍 What’s really in your jewellery?

We’re proud to have supported the BBC’s investigation into toxic jewellery, featured on Morning Live today, 22nd October.

Beautiful jewellery should inspire confidence. Understanding what it contains is an essential part of protecting consumers, and independent testing helps businesses make informed decisions about the products they sell.

Our Analytical Services team offers lead, cadmium and nickel release testing to support responsible sourcing and jewellery safety.

📺 Watch the feature on BBC iPlayer:
https://www.bbc.co.uk/iplayer/episode/m00334rw/morning-live-series-8-22102026 (from 13:54 mins)

📩 To discuss your jewellery testing requirements, contact [email protected] or visit https://www.assayoffice.co.uk/analytical-services/jewellery-testing for more information.

15/10/2026

A behind the scenes look at the nickel testing process at Sheffield Assay Office

From sample preparation to accurate results🔬

We’re proud to have contributed £2,890 to the Master Cutler’s Challenge, supporting Weston Park Cancer Charity.It been g...
13/10/2026

We’re proud to have contributed £2,890 to the Master Cutler’s Challenge, supporting Weston Park Cancer Charity.

It been great to come together with businesses and individuals across Sheffield to help raise vital funds and support the charity’s important work💜

🌟 Check out Goldsmiths North at the stunning Wentworth Woodhouse 🏡 💎 A wonderful opportunity to discover beautiful jewel...
05/10/2026

🌟 Check out Goldsmiths North at the stunning Wentworth Woodhouse 🏡

💎 A wonderful opportunity to discover beautiful jewellery and silverware and meet the talented makers behind it ❤️

We enjoyed a lovely evening celebrating this year’s MA Jewellery and Metalwork students and seeing the huge variety of i...
01/10/2026

We enjoyed a lovely evening celebrating this year’s MA Jewellery and Metalwork students and seeing the huge variety of ideas, materials and stories behind their work.

At Sheffield Assay Office, we love being part of the jewellery trade and supporting the creativity and skill that keeps it moving forward.

Congratulations to Fiona Blythe, Heli Meng, Yufei Qi and Isabel Woods on their awards, and well done to all of the students who exhibited.

A really enjoyable evening celebrating the next generation of makers. 👏

Deep Laser vs Skeletal Laser Which should you choose? 🔍Deep laser is ideal for larger, more prominent marks on finished ...
29/09/2026

Deep Laser vs Skeletal Laser

Which should you choose? 🔍

Deep laser is ideal for larger, more prominent marks on finished or semi-finished pieces. It creates a fuller mark with good definition that can withstand polishing.

Skeletal laser is better suited to thin, hollow, delicate or intricate jewellery where a punch mark may be undesirable.

Swipe through to see the difference on some items recently hallmarked at Sheffield Assay Office.

🔗 click the link in our bio for more information
📞 or call us on 0114 550 8111 to speak with us

24/09/2026

Full melt & assay service — reliable, fast, professional 🔥

More than hallmarking: we offer a fully reliable melt and assay service. Whether it’s precious metal scrap or old jewellery, send it to us and we’ll melt and professionally assay it.

📞 For enquiries call 0114 5508 111
🔗 Or click the link in bio

We were honoured to welcome HRH The Duke of Gloucester to Sheffield Assay Office.During his visit, His Royal Highness sa...
23/09/2026

We were honoured to welcome HRH The Duke of Gloucester to Sheffield Assay Office.

During his visit, His Royal Highness saw first-hand how more than 250 years of hallmarking heritage is combined with modern technology, scientific expertise and skilled craftsmanship.

A very special day for our team and a proud moment for Sheffield Assay Office. 🌹

13/09/2026

What an incredible moment for British horse racing! 🏇🏻

Saffie Osbourne made history at Doncaster by becoming the first female jockey to win a British Classic, riding Highwayman to victory in the historic 250th St Leger.

The occasion was made even more special by the presentation of the Winners Centrepiece, designed and created by award-winning silversmith Jen Ricketts⭐

A landmark victory and wonderful celebration of sporting history and exceptional British craftsmanship.

Congratulations to Saffie and everyone involved!

A pleasure and privilege to welcome The Lord Mayor of Sheffield, Councillor Andrew Sangar MBE DL, and the Lady Mayoress,...
10/09/2026

A pleasure and privilege to welcome The Lord Mayor of Sheffield, Councillor Andrew Sangar MBE DL, and the Lady Mayoress, Councillor Sue Alston, to Sheffield Assay Office✨

It was wonderful to share with them the rich heritage and traditions of Sheffield Assay Office, and to showcase the important work we continue to carry out at the heart of the city’s precious metals and jewellery industries.

A memorable visit celebrating Sheffield, its heritage and the enduring importance of hallmarking. 🌹

Address

Sheffield Assay Office, Guardians’ Hall, Beulah Road, Hillsborough
Sheffield
S62AN

Opening Hours

Monday 8:30am - 4:30pm
Tuesday 8:30am - 4:30pm
Wednesday 8:30am - 4:30pm
Thursday 8:30am - 4:30pm
Friday 8:30am - 4:30pm

Telephone

+441142312121

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