Sotheby's Geneva is showcasing the "Mediterranean Blue Diamond," a 10-carat gem expected to fetch $20 million at auction.

Folks on social media are buzzing with the realization that numerous guests at the 2025 Met Gala sported the historical ...

A 10-carat blue diamond which could fetch $20 million when it goes under the hammer later this month was presented by auction house Sotheby's in Geneva on Thursday. The cushion-shaped piece, known as ...