Talk:Marcel Tolkowsky

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Here are some questions that the article could address, preferably with citations.

Latest comment: 6 years ago1 comment1 person in discussion

Where was Tolkowsky born?
Where did he grow up?
Where did he spend his adult life?
How long was he actively in the diamond cutting business?
How he mange to discover the round shaped diamond ? — Preceding unsigned comment added by 103.54.98.209 (talk) 07:28, 10 June 2017 (UTC)Reply

Did he ever propose modifications to his 1919 round brilliant design?
His family was cutting diamonds circa 1919.
- Did these diamonds have girdles?
- What angle were the star facets cut at? 15 degrees? or 19-20 degrees?
- How steep were the upper girdle facets?
- How many sides did the crown main facets have? 4? or 6?
- How long were the lower girdle facets?
In 1919, Tolkowsky wrote that "The diamonds used as gems are generally colourless or only faintly coloured ; it can be taken that all the light that passes into the stones passes out again."
- Using the modern color grading scale, what color were the diamonds that Tolkowsky was working with?
- Did his assumption that "all the light that passes into the stones passes out again" cause a significant error? See Talk:Material_properties_of_diamond#Optical_properties
- The quotation is from [1]

How large was Tolkowsky's family's diamond business?
Where was the business located? Antwerp, Belgium
How much did the business grow while Tolkowsky was actively involved in it?
Is the business still going as an independent concern? Yes, it is called Tolkowsky and Sons, currently run by Gabi Tolkowsky.
Did Tolkowsky ever work in other people's businesses?
How many generations of Tolkowsky's ancestors were in the diamond business?
Did Tolkowsky have any descendants? Yes, most of them live in Antwerp, Belgium.
Besides Gabi Tolkowsky, did any of Tolkowsky's younger relatives go into the diamond business? Gabi's son is also working in the industry as is his daughter.