A 10-kilo gold coin has been produced by the Royal Mint in Llantrisant, and it is the biggest coin produced in the Mint's 1,100-year history.

The huge coin has already been sold, but its sale price and purchaser remain a mystery. The Mint has said a coin of this calibre and craftsmanship would be priced in the region of six figures.

The 20cm-wide coin was created by a team of master craftspeople, combining traditional skills with innovative technology.

Modern techniques were used at the start of the process, with engraving machines used to carefully cut the design on to the coin.

A master toolmaker then hand-worked the coin, removing any marks made by the cutting process, before four days of polishing. Finally, the coin was laser-frosted to texture the surface, completing 400 hours of work.

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For those whose budgets would not have stretched in any case to purchase the £10,000 denomination gold masterwork, versions of the design are available in a range of finishes, with prices starting at £13 for a £5 denomination brilliant uncirculated coin.

The coin marks the conclusion of the Mint’s Queen’s Beasts commemorative coin collection. The series takes its inspiration from 10 stone statues that lined the Queen’s route to Westminster Abbey at her coronation in 1953.

Starting with the Lion of England in 2017, the collection has showcased the history and symbolism of each creature in turn.

The coin reunites all 10 beasts in one design, also including a lion, griffin, falcon, bull, yale, greyhound, dragon, unicorn and a horse.

Clare Maclennan, divisional director of commemorative coin at the Royal Mint, said:

“We are delighted to unveil a Royal Mint first with the creation of the UK’s largest coin to celebrate the conclusion of our Queen’s Beasts commemorative coin collection.

"It is the latest in our Masterworks series, which offer unique works of art for collectors, exclusively from The Royal Mint.

“The Royal Mint’s Queen’s Beasts commemorative coin collection has grown in popularity since the first beast was introduced in 2017 and has become a firm favourite amongst coin collectors across the globe.

“This coin sets a new standard for minting – combining centuries old techniques with innovative technology to create a unique and beautiful work of art. It is the largest coin ever created by The Royal Mint, and is testament to the expertise, craftsmanship and skill of our team.”