Marcel Tolkowsky – Harry & Co Jewellery

Background and Contributions

Marcel Tolkowsky was a Belgian member of a Jewish family of diamond cutters from Poland.
He is acknowledged as the father of the modern round brilliant diamond cut.
Tolkowsky studied the grinding of diamonds as part of his PhD topic at the University of London.
He published the specifications of the American Standard (also known as the American Ideal Cut or Tolkowsky cut), which became the diamond-cutting benchmark in North America.
Tolkowsky found that the depth and angle of a diamond's cut affect its brilliance, fire, and sparkle.

Many of Tolkowsky's family members, including his cousin Lazare Kaplan and great-nephew Gabi Tolkowsky, have become noted diamond cutters.

Tolkowsky's book, 'Diamond Design,' outlined the specifications for the American Standard cut.
The American Standard cut was derived from mathematical calculations considering brilliance and fire.
Tolkowsky's original model was intended as general guidelines, with later modifications made to round brilliants.

The New York Times published an obituary for Marcel Tolkowsky in 1991.
A research article by Michael Cowing titled 'Diamond Brilliance: theories, measurement and judgement' discusses Tolkowsky's work.
Tolkowsky's thesis, 'Research on the Abrading, Grinding or Polishing of Diamond,' does not define the Tolkowsky cut.
Another publication by Tolkowsky, 'Diamond Design: A Study of the Reflection and Refraction of Light in a Diamond,' explores the topic further.
The Gemological Institute of America provides additional information on Marcel Tolkowsky's work.

Tolkowsky Diamonds has an official website showcasing their diamond designs.
'Diamond Design: A Study of the Reflection and Refraction of Light in a Diamond' by Marcel Tolkowsky is available for further reading.
Wikipedia offers a biographical article about Marcel Tolkowsky, which can be expanded.
Information on Marcel Tolkowsky can be retrieved from the Wikipedia page dedicated to him.
Categories associated with Marcel Tolkowsky include his birth and death dates, profession, and religious background.

Reference	URL
Glossary	https://harryandcojewellery.com.au/blogs/glossary/marcel-tolkowsky
Wikipedia	http://en.wikipedia.org/wiki/Marcel_Tolkowsky
Wikidata	https://www.wikidata.org/wiki/Q997178
Knowledge Graph	https://www.google.com/search?kgmid=/m/06ry4s