The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...

and mesmerizing ocean-blue hue position it among the most important blue diamonds to appear in recent years.” Fashioned from a 31.94-carat rough diamond discovered at South Africa’s famed Cullinan ...

Mediterranean Blue, a 10.03-carat blue diamond, will be revealed to the public for the first time at Abu Dhabi’s Bassam ...