The Lesotho rough diamond, weighing in at a massive 601 carats, was accidentally discovered in 1967 and led to the establishment of the Lets'eng diamond mine.

Harry Winston, who purchased the diamond in 1968, cleaved it into 18 pieces that yielded 18 beautiful diamonds. The largest one, an emerald cut weighing 71.73 carats, was called the Lesotho I and has a beautiful pink hue.

Aristotle Onassis bought the 40 carat Lesotho III for Jacqueline Kennedy as an engagement gift. It came up for sale at a Sotheby's auction in 1996, and after a frenzied bidding between two anonymous bidders, sold for $2.59 million.

The Lesotho rough is also famous for being the largest diamond discovered by a woman. It is also the seventh largest rough diamond ever discovered in the world.

Information courtesy: Internetstones.com