Editor’s Note
This article details the unveiling of the ‘Mediterranean Blue Diamond,’ a 10-carat cushion-shaped gem expected to sell for up to $20 million at a Sotheby’s auction in Geneva.

A 10-carat blue diamond, expected to fetch up to $20 million at auction, was unveiled by Sotheby’s in Geneva.
The cushion-shaped stone, known as the ‘Mediterranean Blue Diamond’, was mined in South Africa and exhibits a rare color described as an elegant intense blue, according to Sotheby’s.
Sotheby’s high jewelry collection, which includes other colored gemstones, was presented to journalists in Geneva ahead of a live auction scheduled at the Mandarin Oriental Hotel.