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Corundum - Where and Why?
Dr. A. Peretti, founder and
director of GRS Gemresearch Swisslab, Lucerne, Switzerland, speaks on the origins of
sapphire and ruby.
Information on Kashmir sapphires which
appears in this interview will be included in an upcoming book on sapphire, authored by A.
Peretti, R. Kundig and J. Mullis
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