Guinness World Records 2013: L'INCOMPARABLE DIAMOND NECKLACE L'Incomparable Diamond Necklace—awarded Most Valuable Necklace in the world by Guinness features the world's largest internally flawless diamond—the 407.48 Incomparable Diamond. 2010: The Mouawad 1001 Nights Diamond Purse The Mouawad 1001 Nights Diamond Purse—the most valuable handbag in the world ($3.8 Million), Guinness World Records, 2010. 2003: The very sexy fantasy bra The Very Sexy Fantasy Bra—the most luxurious and expensive piece of lingerie ever made ($11 Million), Guinness Book of World Records, 2003. 1990: The Mouawad Splendor The Mouawad Splendor—the most expensive single pear-shaped diamond (101.84 carats, $12,760,000), purchased by Robert Mouawad, Guinness Book of World Records, 1990.