A big success has been the Long Night of Gemstones in 2022 and 2023. As an integral part of INTERGEM the Long Night of Gemstones will be continued.

With the exhibitors, we invite you to visit INTERGEM 2025 and at the same time to experience the uniqueness and competence of Idar-Oberstein during the Long Night of Gemstones.

On Saturday of the trade fair,  April 12, 2025, from 7:00 p.m. to midnight, selected institutions and locations of the jewellery and gemstone industry in Idar-Oberstein will be open to exhibitors and visitors of the INTERGEM free of charge in a pleasant evening atmosphere. Citizens of the city of Idar-Oberstein are also cordially invited. At the individual institutions there is not only the right information on this evening, but also an attractive supporting program with readings, guided tours, musical performances and informative contributions.

The official opening ceremony of the Long Night of Gemstones will be held at 6.45 p.m. by the reigning German Gemstone Queen Cécile Elligsen who will be patroness of the the event for the second time. The location of the opening ceremony will be published shortly.

INTERGEM organizes bus shuttles so that visitors can decide which and how many stations they want to visit that evening. Alternatively, you can drive to the stations with your own car or on foot. There are capacity limitations for the guided tours. In this respect, if you are interested, online pre-registrations via the INTERGEM are required. Pre-registration options and details of the participating institutions will be published here about two months before the event.

The response to the second Long Night of Gemstones in 2023 was far above expectations. More than 350 visitors were welcomed in the German Gemstone Museum alone. All tours of the German Gemstone Museum, the Bengel industrial monument, the Fischbach Copper Mine and the Steinkaulenberg Gemstone Mine were fully booked. This is how the bridge from the INTERGEM trade fair to the city and the region was successful. Something like that actually only exists in Idar-Oberstein. In 2025 INTERGEM will celebrate its 40th birthday together with the 3rd edition of the Long Night of Gemstones.