The Trial of the Pyx is a formal judicial process dating back to the 13th century. The word “Pyx” refers to the chests used to store coins before they are examined.
During the ceremony, a random sample of coins is selected and set aside for detailed scientific testing. An independent jury - traditionally made up of members of The Goldsmiths’ Company - is sworn in to oversee the process. The coins are then rigorously analysed to confirm they meet legal standards.
The Trial plays a critical role in maintaining public trust in UK currency, combining centuries-old tradition with modern analytical methods.