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May 2004 - The poster report "HPHT-treatment and microscopic investigation of IIa diamonds" has been presented by Prof. Dr. Heiner Vollstaedt (director of Ahprodiamante GmbH) and Prof. Dr. Hans-Joachim Bautsch at the NATO Advanced Research Workshop "Innovative Superhard Materials and Sustainable Coatings" held in Kiev, Ukraine on May 12-15, 2004. The proceeding of the NATO ARW are pending publishing.