Author: Pagel-Theisen, Verena G.G. F.G.A. D.Gem.G.
Title: Diamanten-Fibel. Handbuch der Diamanten-Graduierung
Description: Hanau 1972, (15,4 x 21,5 cm), 211 pp. German tekst, numerous ills., hardcover Derman Edition ! Quality Evaluation of Colour, Clarity, Cut and Weight. With 450 illustrations, and 5 tables Daimond Imitations

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