Golconda diamond expected to sell for over $15 million

A 76-carat diamond billed as one of the most famous in the world is expected to fetch well over $15 million when it hits the auction block in November. The colossal gem, which Christie's said was the finest and largest perfect Golconda diamond ever to appear at auction, is perfect in color and internally flawless. (Reuters)

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A model holds the "Archduke Joseph" historial diamond on October 3, 2012 during a Christie's auction preview in Geneva. Once part of the collection of the Archduke Joseph of Austria (1872-1962), the D color diamond, weighing 76,02 carats and mined at the legendary Indian Golkonda mine, is expected to reach between 15 million and 20 million US dollars at an auction on November 13 in Geneva. AFP PHOTO / FABRICE COFFRINI
A model holds the "Archduke Joseph" historial diamond on October 3, 2012 during a Christie's auction preview in Geneva. Once part of the collection of the Archduke Joseph of Austria (1872-1962), the D color diamond, weighing 76,02 carats and mined at the legendary Indian Golkonda mine, is expected to reach between 15 million and 20 million US dollars at an auction on November 13 in Geneva. AFP PHOTO / FABRICE COFFRINI