Fancy owning this diamond? It will only cost you over a million pounds

The diamond is set in a Trombino ring made by the Italian jeweller Bulgari. Credit: John Stillwell/PA Wire

The New Bond Street auctioneers Bonhams have been showing off a 'fancy' deep-blue diamond which they will auction off on April 24th. Blue diamonds are very rare while the term 'fancy' is used to describe its intense colour.

Two years ago, Bonhams sold another blue diamond ring for £1.9m so their experts predict this one is likely to be sold for a similar sum.