It was named the Centenary Diamond as it was presented in the rough for the Centennial Celebration of De Beers Consolidated Mines on 11 May 1988.
The original rough was 599 carats (119.8 g) and it was presented on 11 May 1988 in the Centennial Celebration of the De Beers Consolidated Mines.
Gabi Tolkowsky was chosen to head the team responsible for cutting the Centenary Diamond, along with Geoff Woolett, Jim Nash and Dawie du Plessis, assisted by a specially-picked group of engineers, electricians and security guards to facilitate in the work on Centenary Diamond.
"[citation needed] The Centenary was completed in February 1991, weighing 273.85 carats (54.770 g) with its dimensions measuring 39.90 × 50.50 × 24.55 mm.
It is believed that De Beers no longer owns the Centenary, but the current owner is unknown.