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Kurt Nassau

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Stand Alone

Color for science, art and technology
Gems Made by Man
Experimenting with color
Gemstone Enhancement Heat, Irradiation, Impregnation, Dyeing, and Other Treatments which Alter the Appearance of Gemstones, and the Detection of Such Treatments
Experimenting with Color
Color for Science, Art and Technology
Gemstone Enhancement History, Science and State of the Art