Actress Emilia Fox unveils the Diamond Jubilee Egg, valued at £100.000 as the prize for the Faberge Big Egg Hunt

A Diamond Jubilee rose gold egg worth £100,000, held here by actress Emilia Fox, is the prize on offer for the Faberge Big Egg Hunt in London.

One of the eggs to be hunted for in the Faberge Big Egg Hunt around London. Photo by Jamie O'Donnell via iwitness24

The glittering egg is decorated with 60 gemstones, including diamonds, emeralds, rubies and sapphires - one for each year of the Queen’s reign.

It was created by Faberge and unveiled at the famous jeweller’s central London boutique.

It is hoped enough people will take part in the egg hunt, which got under way yesterday, to make it the world’s biggest.

More than 200 eggs - decorated by famous names including Bruce Oldfield, Sir Ridley Scott and Zandra Rhodes – have been hidden across London.

Egg-hunters can enter to win the golden prize by texting a keyword found on each egg to 80001. There is one entry for each keyword texted.

The hunt is raising funds for charities Elephant Family and Action for Children and the decorated eggs used in the hunt will be auctioned when it finishes at Easter.