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- Marcel_Tolkowsky abstract "Marcel Tolkowsky (25 December 1899 – 10 February 1991) was a member of a Polish family of diamond cutters and an engineer by education. He is generally acknowledged as the father of the modern round brilliant diamond cut. Many of his family have gone on to become noted diamond cutters, including his cousin Lazare Kaplan and his great nephew Gabi Tolkowsky.Tolkowsky, as part of his PhD topic at the University of London, systematically studied the grinding of diamonds.Around the same time, in his book Diamond Design, he published the specifications of what would later be called the American Standard (also known as the American Ideal Cut, Tolkowsky cut, and Tolkowsky Brilliant), which is the diamond-cutting benchmark in North America. It was derived from mathematical calculations that considered both brilliance and fire of the stone. Marcel Tolkowsky found that if a diamond was cut too deep or shallow then light would escape out the sides or bottom of the diamond resulting in a loss of brilliance (white light reflected up through the top of a diamond), fire (colored light reflected from within a diamond), and sparkle (combination of fire and brilliance). The original model was intended to be a set of general guidelines; several aspects of a diamond's cut had not been accounted for or explored. Later modifications of round brilliants differ in minor ways.".
- Marcel_Tolkowsky wikiPageExternalLink diamond.
- Marcel_Tolkowsky wikiPageExternalLink www.tolkowsky.com.
- Marcel_Tolkowsky wikiPageID "2168250".
- Marcel_Tolkowsky wikiPageLength "3062".
- Marcel_Tolkowsky wikiPageOutDegree "14".
- Marcel_Tolkowsky wikiPageRevisionID "705268052".
- Marcel_Tolkowsky wikiPageWikiLink Brilliant_(diamond_cut).
- Marcel_Tolkowsky wikiPageWikiLink Category:1899_births.
- Marcel_Tolkowsky wikiPageWikiLink Category:1991_deaths.
- Marcel_Tolkowsky wikiPageWikiLink Category:Belgian_Jews.
- Marcel_Tolkowsky wikiPageWikiLink Category:Belgian_engineers.
- Marcel_Tolkowsky wikiPageWikiLink Category:Diamond_cutting.
- Marcel_Tolkowsky wikiPageWikiLink Diamond.
- Marcel_Tolkowsky wikiPageWikiLink Diamond_cut.
- Marcel_Tolkowsky wikiPageWikiLink Diamond_cutting.
- Marcel_Tolkowsky wikiPageWikiLink Gabi_Tolkowsky.
- Marcel_Tolkowsky wikiPageWikiLink Lazare_Kaplan_International.
- Marcel_Tolkowsky wikiPageWikiLink North_America.
- Marcel_Tolkowsky wikiPageWikiLink Poland.
- Marcel_Tolkowsky wikiPageWikiLinkText "Marcel Tolkowsky".
- Marcel_Tolkowsky wikiPageUsesTemplate Template:Belgium-bio-stub.
- Marcel_Tolkowsky wikiPageUsesTemplate Template:Reflist.
- Marcel_Tolkowsky wikiPageUsesTemplate Template:Use_dmy_dates.
- Marcel_Tolkowsky subject Category:1899_births.
- Marcel_Tolkowsky subject Category:1991_deaths.
- Marcel_Tolkowsky subject Category:Belgian_Jews.
- Marcel_Tolkowsky subject Category:Belgian_engineers.
- Marcel_Tolkowsky subject Category:Diamond_cutting.
- Marcel_Tolkowsky hypernym Member.
- Marcel_Tolkowsky type Person.
- Marcel_Tolkowsky comment "Marcel Tolkowsky (25 December 1899 – 10 February 1991) was a member of a Polish family of diamond cutters and an engineer by education. He is generally acknowledged as the father of the modern round brilliant diamond cut.".
- Marcel_Tolkowsky label "Marcel Tolkowsky".
- Marcel_Tolkowsky sameAs Q997178.
- Marcel_Tolkowsky sameAs Marcel_Tolkowsky.
- Marcel_Tolkowsky sameAs Marcel_Tolkowsky.
- Marcel_Tolkowsky sameAs Marcel_Tolkowsky.
- Marcel_Tolkowsky sameAs m.06ry4s.
- Marcel_Tolkowsky sameAs Q997178.
- Marcel_Tolkowsky wasDerivedFrom Marcel_Tolkowsky?oldid=705268052.
- Marcel_Tolkowsky homepage www.tolkowsky.com.
- Marcel_Tolkowsky isPrimaryTopicOf Marcel_Tolkowsky.