Adam Phillips

The Goldsmiths’ Company Assay Office, the home of hallmarking and the renowned Antique Plate Committee, are the leaders in antique plate authentication services. They are the only company in the UK to offer a silver dating service. Other fully independent services include:

Hallmarking (new and second-hand items)
Professional valuations for jewellery, silverware and watches
Silver dating
Special assay & specialist laboratory services
Non-destructive compositional analysis
Antique plate authentication
Bespoke training and educational programmes


Goldsmiths' Hall: This is our flagship office, where hallmarking began over 700 years ago. Here we offer our full range of services and it is where our high tech laboratory is located.

Goldsmiths’ Hall
Gutter Lane

Greville Street Sub-office: This office specialises in priority hallmarking services for low quantities of items and is conveniently located for the local community of Hatton Garden. Please note that this office cannot accept postal packages. Any items sent through the post will be delivered to Goldsmiths' Hall.

17 Greville Street
Hatton Garden

Also located at Heathrow Airport, within Allied Gold in Dalston, and Graff Diamonds Mayfair.

Upcoming Events

Hallmarking Information Day
Date: Monday 11th April 2016
Venue: Goldsmiths’ Hall

This long-established seminar is an informal event attended by those who want to find out more about the Assay Office and the hallmarking process.
Learn about the legal requirements of assaying and hallmarking; enjoy an exclusive tour of the Assay Office; explore the Goldsmiths’ Company Library and Archives; take part in a series of practical, hands-on sessions and have a go at hand-marking; and have a personal item of silver or jewellery tested.
The cost of the day, including lunch with wine and a certificate of attendance, is just £60 per person.
For further information and booking details visit the website: call 020 7606 8971 or email: [email protected]

We are delighted to announce that the Hallmarking Information Day is our latest course to achieve full CPD accreditation. You can now claim six hours of Continuous Professional Development if you attend this event.
If you would like to know more, please email us.

Fakes & Forgeries Seminar
Date: Monday 13th June 2016 (9:30am - 4:00pm)
Venue: Goldsmiths’ Hall

Focusing on antique silverware and jewellery, this seminar combines educational lectures from renowned experts in the trade such as Alastair Dickenson and Susan Rumfitt from the BBC’s Antiques Roadshow, plus first-hand contact with a variety of spurious items. The event is aimed at dealers, auction houses, curators and collectors.

For further information and booking details visit the website: call 020 7606 8971 or email: [email protected]