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Top Polished Diamonds: Centenary

 

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Discovered at the Premier Mine, in July 1986, the Centenary diamond weighed 599.10 carats in the rough. Together with a small select team, master-cutter Gabi Tolkowsky took almost three years to complete its transformation into the world's largest, most modern cut, top-colour, flawless diamond.

Possessing 247 facets--164 on the stone and 83 on its girdle--the aptly-named Centenary diamond weighs 273.85 carats, and is only surpassed in size by the 530.20 carat Great Star of Africa and the 317.40 carat Lesser Star of Africa, both of which are set into the British Crown Jewels. The Centenary diamond was unveiled, appropriately, at the Tower of London in May, 1991.