Welcome to the Goldsmiths' Company Assay Office


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Every Mark Matters

The Goldsmiths’ Company Assay Office is where hallmarking began, and we have been testing and hallmarking precious metals for over 700 years. At the Goldsmiths' Company Assay Office we provide both traditional handmarking and the latest laser marking techniques across three key London locations with a choice of three priority services including one hour, same day and early hall. We process 3 million articles a year, in 100,000 packets, and are proud to apply the leopard's head townmark of London to each and every one. 

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Disclaimer: Price does not include VAT. The Goldsmiths’ Company Assay Office makes every effort to ensure the accuracy of calculations, but will not be held responsible for any subsequent loss or inconvenience. Prices given are indicative only and will depend on registration type, options chosen during packet submission etc.

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Disclaimer: Price does not include VAT. The Goldsmiths’ Company Assay Office makes every effort to ensure the accuracy of calculations, but will not be held responsible for any subsequent loss or inconvenience. Prices given are indicative only and will depend on registration type, options chosen during packet submission etc.

News & Events

Verdict of the Pyx

Today marked the conclusion of the Trial of the Pyx 2017.  The Verdict was read to the jury by the Clerk of the Goldsmiths' Company. The Queen's Remembrancer was in attendance at Goldsmiths' Hall.  

Since February, the Laboratory Team at the Assay Office have been testing a random selection of coins which were brought to us for analysis by The Royal Mint. Representatives of the Goldsmiths' Company and Assay Office declared their findings at the Verdict.

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"Guardians of Gold" in Chemistry World Magazine

Elinor Hughes, Feature Writer at Chemistry World, visited the London Assay Office "to watch its precious metal analysts at work".  

The result was an excellent article and video called "Setting the Gold Standard".   Watch for explanations of our metal analysis methods. 

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