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Diamond Bourse Idar-Oberstein

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Diamond Bourse Idar-Oberstein (DEIO) is a registered association founded in 1974 as the world's first combined bourse for both diamonds and colored gemstones, serving as an international trading platform and interest representation for its members.

Last updated September 16, 2026

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Overview

The Diamant- und Edelsteinbörse Idar-Oberstein e.V. (DEIO) was opened in 1974 as the world's first combined bourse for both diamonds and colored gemstones. It is run as a registered association (eingetragener Verein) and serves as an international trading platform and interest representation for its members. In 1975 the DEIO was unanimously admitted to the World Federation of Diamond Bourses (WFDB), which today includes 30 bourses around the globe. The bourse monitors the competence, integrity and seriousness of its members. Idar-Oberstein has been a leader in the gemstone industry for more than 500 years. The DEIO's focus is on colored gemstones, which traditionally occupy about 90 percent of the businesses in the Idar-Oberstein region. Jochen Müller has been president since 2003, with vice-presidents Manfred Giloy, Christian Klein and Bernd Willi Ripp.

History

The Diamant- und Edelsteinbörse Idar-Oberstein e.V. (DEIO) was opened in 1974 as the world's first combined bourse for both diamonds and colored gemstones. It is run as a registered association and serves as an international trading platform and interest representation for its members. In 1975 the DEIO was unanimously admitted to the World Federation of Diamond Bourses (WFDB), which today includes 30 bourses around the globe. Through its membership, the DEIO and indirectly its members are bound by the statutes of the world federation. For example, the DEIO arbitrates and judges in disputes among its members and informs the secretariat in Antwerp, which notifies all bourses affiliated with the WFDB and their members. Worldwide there are 27 diamond bourses and 3 colored gemstone bourses; the most important are in Antwerp, Tel Aviv, Mumbai and New York. The DEIO's focus is on colored gemstones, which traditionally occupy about 90 percent of the businesses in the Idar-Oberstein region. Jochen Müller has been president since 2003; the vice-presidents are Manfred Giloy, Christian Klein and Bernd Willi Ripp.

Products and positioning

International trading platform and interest representation for its members, focused on colored gemstones.

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