No precise estimate of the value of this 5.51 carat stone exists but its incredible rarity means it takes top spot in this Billionaires countdown.

The Ocean Dream was the first, and remains one of only a miniscule number, to be classed as fancy deep-blue green in colour. It gained its unique colour after being exposed to radiation over millions of years.

This amazing stone was found in Central Africa and is part of the collection owned by the Cora Diamond Corporation.

So next time you’re shopping for a diamond, don’t automatically look for the brilliant white variety. The rarity of some coloured diamonds means they can be incredibly valuable, as well as incredibly beautiful to look at.

Original Author: