Diamonds: Someone's Best Friend

By Scott Reyburn - 2013-09-10T21:12:31Z

Photograph by Christie's International via Bloomberg News

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The Wittelsbach

The Wittelsbach Diamond, an extremely rare 35.56 carat, 17th century, fancy deep grayish-blue diamond. The colored diamond was once owned by King Philip IV of Spain and sold for 16.4 million pounds ($24.3 million).