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Article: Marcel Tolkowsky

Marcel Tolkowsky

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.

Family Legacy

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

Diamond Design

  • 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.

External Links

  • 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.

Marcel Tolkowsky Data Sources

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