2026 Reading Challenge

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Are you Kurt Nassau, author of the books below?
The Physics and Chemistry of Color by Kurt Nassau Gems Made by Man by Kurt Nassau Gemstone Enhancement, Second Edition by Kurt Nassau Experimenting With Color by Kurt Nassau L'abbellimento artificiale delle gemme - Teoria e pratica by Kurt Nassau Gemstone Enhancement by Kurt Nassau Color for Science, Art and Technology (Volume 1) by Kurt Nassau An Ideal Couple by Kurt Nassau Lasers and laser materials by Kurt Nassau Gemstone Enhancement Heat, Irradiation, Impregnation, Dyeing,... by Kurt Nassau


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