The Donnersmarck Diamonds are exceptional yellow stones with a fascinating and impeccable provenance. One is a magnificent pear-shaped diamond weighing 82.48 carats, the other a magnificent cushion-shaped diamond weighing 102.54 carats. They were sold for $7,912,373.

They were gifted by Furst Henckel von Donnersmarck, a German nobleman, industrial magnate and one of the richest men of his time, to his first wife, Pauline Therese Lachmann, a courtesan better known as La Paiva.

After her death in 1884, Henckel had her naked body immersed in alcohol in an isolated room of his castle at Neudeck and visited her corpse regularly

Information courtesy: Wikipedia