L'Incomparable Diamond Necklace

This necklace by Lebanese jewelers Mouawad, dubbed L'Incomparable, boasts the world's largest internally perfect diamond. Before being combined into this exquisite Mouawad necklace, which was first revealed at the Doha Jewelry and Watch Exhibition in 2013, it was displayed in museums like the Smithsonian Institution in Washington, DC.

According to Forbes.com, the L'Incomparable Diamond Necklace, with a total weight of 637 carats, is worth $55 million. The 407.48-carat Fancy Deep brownish-yellow shield step-cut diamond in the 18k rose gold necklace is the largest internally flawless diamond ever graded by GIA.

35 raw diamonds, 27 pear-shaped diamonds, nine heart-shaped diamonds, five emerald-cut diamonds, five cushion-cut diamonds, four oval-shaped diamonds, three Asscher-cut diamonds, and two radiant-cut diamonds make up the opulent necklace's surrounding jewels.

A little girl in the Democratic Republic of Congo discovered the Incomparable diamond in a rubble pile in 1980. Because the rubble was deemed too big, it had not been tested for diamonds. The rough diamond weighed 890 carats before it was cleaned and shown to the public in 1984. It was then displayed at the Smithsonian Institution's National Museum of Natural History and has since been seen in a number of other museums.

Price: $55 million