The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction on May 13.

From sparkling multi-million-dollar diamonds to custom designs, here are the most expensive diamond rings in the world that ...

"The Mediterranean Blue" will be auctioned by Sotheby’s this Spring in Geneva with a classification representing less than ...

These rare gems take on different hues & properties ... which absorbs blue light and gives the diamond a sunny, golden hue. * ...

‘The Mediterranean Blue’ diamond worth an estimated $20m to be displayed in Abu Dhabi An ultra-rare diamond worth an estimated $20m is coming to Abu Dhabi. The 10.03-carat precious gem is on a world ...