Jaw-Dropping Jewels
Athina Onassis, the billionaire daughter of Greek shipping magnate Aristotle Onassis and the step-daughter of Jacqueline Kennedy Onassis, auctioned off this 38-carat diamond -- which once belonged to her late mother, Christina -- for $7.1 million on June 11, 2008, Reuters reported. The diamond sold for roughly twice as much as expected.