This is the world’s second biggest flaweless diamond, weighing 203 carats. The newly-discovered stone could produce an even larger gem. How big do you think this diamond is?

A diamond twice as big as the Cullinan Diamond - formerly the world’s largest - that could be worth up to £15million has been discovered in northwest South Africa but the tale of its discovery is still shrouded in mystery.

The diamond is being rushed to a bank vault in Johannesburg “until we calm down and decide what we are going to do,” a spokesman for the mining company that discovered it has reportedly said. A security company is being hired to protect the dazzling stone.

The Cullinan, found more than a century ago near Pretoria, weighs 530.24 carats and held the record of the largest cut diamond in the world until 1985. Then it was overtaken by the Golden Jubilee, weighing 545.67 carats, which was found in the same mine. The Cullinan now forms part of King Edward’s sceptre in the Tower of London.

Fred Cuellar, founder of Diamond Cutters International, told the Guardian: “It caught everbody in the diamond industry offisde. There will be a lot of mad bidding from a lot of private individuals as to who is going to buy this stone.

Thanks to Dailymail.co.uk.