Photos: Egg-Sized Diamond for $21.5M

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Photos: Egg-Sized Diamond for $21.5M Christie's auctioned the "Archduke Joseph" diamond which weighs 76.02 carats and was mined at the legendary Indian Golkonda mine. It was expected to reach between $15 and 20 million at an auction in Geneva on Nov. 13, 2012. The diamond is about the size of a quail's egg and is named after the Archduke Joseph August of Austria.

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