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.
During this time, Gabi Tolkowsky was again tapped by the De Beers group in order to design and cut the Golden Jubilee Diamond.
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Speakers included diamond cutters Maarten DeWitte, Brian Gavin and Gabi Tolkowsky; American Gem Society representatives James Caudill and Peter Yantzer; technology developers Garry Holloway, Udi Lederer, Janak Mistry, Yuri Shelmentiev and Sergey Sivovolenko, Octonus; and researchers V.K. Baranov, A.M.
Many of his family have gone on to become noted diamond cutters, including his cousin Lazare Kaplan and his great nephew Gabi Tolkowsky.