World's priciest chocolate goes on display

The world's most expensive chocolate has gone on display at a chocolate fair in Obidos in Portugal.

Priced at 7,728 euros ($US9,489) and covered in edible gold, the chocolate is part of a limited edition of 1,000 bonbons.

It has a filling of saffron threads, white truffle, vanilla from Madagascar and gold flakes.

It is being guarded by two uniformed men.

Its creator, Portuguese chocolatier Daniel Gomes, said the diamond-shaped chocolate was certified as the world's most expensive by the Guinness Book of Records, which in 2017 listed $US250 La Madeline au Truffe made by Danish artisan chocolate-maker Fritz Knipschildt's as the record holder.

Its crown-shaped box is decorated with 5,500 Swarovksi crystals and also carries personalised pincers.