Brilliant "Archduke Joseph," for many years owned by the family of the Austrian Archduke Joseph August, went under the hammer at Christie's in Geneva for 20, 3 million francs ($ 21, 5 million). Without a doubt, this stone is one of the rarest and most famous diamonds in the world. Luxury blameless diamond weighing 76 carats 02 is pure color. There is a stone diamond vintage copies in Golconda (India) - source, the world hath brought the largest number of historically significant diamond. According to its characteristics diamond "Archduke Joseph" is comparable to the legendary diamond "Kohinoor", which adorns the British Crown.