President of the Diamond and Precious Stones Bourse Idar-Oberstein e.V. and Head of the Steering Committee of the prestigious international trade show Intergem e.V. Mr. Jochen Müller, a third-generation diamantaire, serves the Diamant- und Edelsteinbörse Idar-Oberstein e.V. (the Diamond and Gemstones Exchange Idar-Oberstein) (DEIO) as its president since 2003. Since 1995, Mr. Jochen …