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THE "IDEAL CUT" DIAMOND (DIAMONDS.) Tolkowsky, Marcel. Diamond Design. A Study of the Reflection and Refraction of Light in a Diamond. 37
THE "IDEAL CUT" DIAMOND (DIAMONDS.) Tolkowsky, Marcel. Diamond Design. A Study of the Reflection and Refraction of Light in a Diamond. 37 illustrations. Small 8vo, publisher's gilt-lettered blue cloth, tips and spine ends rubbed with some minor fraying at head and joints. London and New York, 1919
- Notes: first edition of Tolkowsky's treatise wherein a systematic mathematical analysis of the optics of diamonds is detailed for the first time in print. "The real substance is in the third part [of the book] where Tolkowsky demonstrates light paths in rose-cut and brilliant-cut gems, and shows how only certain angles of facet inclination can insure production of maximum brilliance... a classic in lapidary work and now quite rare"--Sinkankas 6663. With little alteration, today's standards for "ideal cut" diamonds are based on Tolkowsky's book. One of only a few copies remaining in private hands.
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