Background
In the 1800s Abraham Tolkowsky worked with precious stones. In the 1840s the Tolkowsky family moved to Antwerp. Abraham Tolkowsky’s son Maurice established a good reputation in the business.
Isadore and Sam now worked closely alongside their brother Maurice, and their father Abraham.
Maurice invented the first diamond bruiting machine, which is fundamental to creating a perfectly round diamond.
His brother Sam was elected the first chairman of the Antwerp Diamond Exchange.
Career
He is the great nephew of Marcel Tolkowsky, the father of the modern round brilliant diamond cut. He invented the "flower cuts" in 1985-1986, and since 1995, he has been a worldwide consultant to the De Beers group. Centenary Diamond In 1988, he was commissioned by them to act as master cutter for the 273.85 carats (54770 g) Centenary Diamond, a task which took three years.
This monumental diamond remained untouched for over a year while the correct tools and technical conditions were created by Gabi and his team
The gem was kerfed (hand cleaved) in order to avoid heator vibration-related damage from saws or lasers. Finally in 1991 the Tolkowsky’s De Beers Centenary Diamond was finished weighing 273.85 carats (54770 g) presents 247 facets and is acknowledged as the largest, most colour-perfect and flawless modern diamond cut in the world.
Golden Jubilee Diamond During this time, Gabi Tolkowsky was again selected by the De Beers group in order to design and cut the Golden Jubilee Diamond. The Golden Jubilee is the largest faceted diamond in the world, weighing 545.67 carats (109134 g), more than the Cullinan I. The diamond was a 755.50-carat (151100 g) rough stone.
World famous, it presents 148 facets, weighs 545.65 carats (109130 g), has a yellow-brown colour intensified by the brilliant cushion cut.
The Golden Jubilee was chosen as a gift to the King of Thailand to celebrate his 50 years on the throne. Gabrielle Diamonds Drawing from techniques learned during the polishing of the Centenary and the Golden Jubilee diamonds, and from his experience with the "Flower Cuts", Gabi created the Gabrielle Diamonds, the world"s first triple brilliant cut diamond. The Gabrielle Diamond in the Round shape consists of 105 facets, 48 facets more than the Classic Round Brilliant cut (with additional 8 crown facets and 40 pavilion facets).
The Gabrielle Diamond was shown by a Light Study to exhibit 200% more scintillation than an excellent-cut classic brilliant diamond, and at the same time exhibited significantly greater brilliance and fire.
