Like the Cullinan diamonds, the Centenary and the Millenium Star, the Premier Rose belongs to the 'purest of the pure' category; these extremely rare diamonds are flawless.

Discovered in March 1978 -- the rough diamond was a whopping 353.9 carats -- it yielded the Big or Premier Rose weighing 137.02 carats, the Little Rose weighing 31.34 carats and the Baby Rose weighing 2.11 carats.

The Premier Rose was sold to an anonymous buyer for $10 million in 1979.

More recently, it was purchased by connoisseur Robert Mouawad for his collection of rare diamonds.

Information courtesy: Internetstones.com