2. The Oppenheimer Blue Diamond Ring – $57.5 Million This ring features a 14.62-carat Fancy Vivid Blue diamond, the largest of its kind ever sold at auction. Named after its previous owner, Sir ...

The largest diamond found in more than a century has been unearthed at a mine in Botswana, and the country's president showed off the fist-sized stone to the world at a viewing ceremony Thursday.

Melania's engagement ring boasts a 25-carat emerald cut diamond, and the shape symbolises clarity within a relationship and a loving open heart. The dazzling rock is reportedly from Graff; a ...