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FILE - In this Nov. 16, 2010 file photo, Britain's Prince William and his fiancee Kate Middleton pose for the media at St. James's Palace in London, after they announced their engagement. Few people seem the least bit concerned that Prince William and Kate Middleton, set for the royal wedding on April 29, have been living together off and on since their university days. (AP Photo/Kirsty Wigglesworth, File)

FILE - In this Nov. 16, 2010 file photo, Britain's Prince William and his fiancee Kate Middleton pose for the media at St. James's Palace in London, after they announced their engagement. Few people seem the least bit concerned that Prince William and Kate Middleton, set for the royal wedding on April 29, have been living together off and on since their university days.

World famous jewels

November 14, 2012

Christie's auctioned off the Archduke Joseph Diamond for nearly $21.5 million on Nov. 13, a world auction record price per carat for a colorless diamond. Here is a look at some other rare baubles, from Elizabeth Taylor's personal collection to the world's first ring carved from a diamond created by Swiss company Shawish Jewelry.