Working with The Royal Mint, Emma Noble is most widely recognised for creating the popular Beatrix Potter 50p series, which brought characters such as Peter Rabbit to British coinage.

Emma Noble has also been involved with the creation and design of several significant commemorative coins and collections.

• 2007 £5 Diamond Wedding: Illustrates the stained-glass window of Westminster Abbey to mark the 60th anniversary diamond wedding of Queen Elizabeth II and Prince Philip.
• 2012 Remembrance Day Poppy Coin: Features a poppy design along with the inscription 'The eleventh hour of the eleventh day of the eleventh month'.
• 2013 Coronation Anniversary £5 Coin: Was involved with the creation of the £5 coin for the 60th anniversary of the coronation of Queen Elizabeth II.
• 2016 1966 World Cup 50th Anniversary £5 Coin: Was part of the team which created a £5 coin to commemorate the 50th anniversary of England winning the 1966 World Cup, the design of which was inspired by the 1966 FIFA World Cup logo.
• Beatrix Potter Series: A long running release which ran from 2016 to 2018, Emmn Noble designed the 50p coins which featuring characters such as Peter Rabbit, Jemima Puddle-Duck, Tom Kitten, Jeremy Fisher, and Benjamin Bunny.

During her time at The Royal Mint, Emma Noble contributed to special collectors' items and releases.

• 2017 Windsor Castle Medal: Designed a medal featuring an illustration of the castle for the 2017 Windsor Castle Medal Cover.
• Mary Poppins Series: Released in 2020, Emma Noble remastered Mary Shepherd's original illustrations for a commemorative series of coins.
• 2005 Triumph of Good Over Evil Medal: Emma Noble designed a limited edition bronze medal which was released in 2005.

The work of Emma Noble is frequently sought by collectors, with the 2016 Jemima Puddle-Duck 50p packs, featuring Emma Noble's signature and other uncirculated sets, maintaining high popularity in the numismatic market.