The Mediterranean Blue is a vivid blue diamond ring weighing more than ten carats. And the stone is classified as a type IIb, a rare rank which only 0.5 per cent of the world's diamonds fit into.

Christie's has announced what is sure to be a blockbuster sale in the jewelry world: the sale of a 23.24-carat fancy Golconda ...

Christie’s is getting ready to present The Golconda Blue, the largest Fancy Vivid Blue Diamond ever to be offered at auction.