Marcel Tolkowsky And The Brilliant Round Cut Diamond - CaratsDirect2u Blog
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Marcel Tolkowsky (1898 - 1991) - Genealogy
Expert Guide to Tolkowsky Ideal Cut Diamonds | Whiteflash
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AWDC to mark centennial of Tolkowsky round brilliant cut
Marcel Tolkowsky — Wikipédia
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Pin op Gems
Summary of: Diamond Design -- by Marcel Tolkowsky. Edited by Jasper Paulsen.
The History Of Marcel Tolkowsky | CT Diamond Museum
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Marcel Tolkowsky and the First Ideal Cut Diamond (Specs & Deficiencies)
