After a failed Sotheby's auction, the 1,109-carat diamond has now been sold to British jeweller Graff Diamonds, who already owns a smaller piece of the rough gem.
Graff's Lesotho Promise necklace was designed from the 603 carat Lesotho Promise diamond stone, the 15th largest rough diamond ever recovered, found in the Letsenf diamond mine in the African country of Lesotho.
It...
The Lesotho Promise diamond which was bought by diamond dealer Laurence Graff in 2006 has been cut into 26 smaller diamonds varying in size from .52 carats to 76.41 carats each with a D...
