About us

Who is behind GEMWEB?

At GEMWEB, the specialists in their field have come together to reinvent the future of gemstone buying and selling. This creates synergies that accelerate many processes in purchasing and offer valuable support in sales. Together with our customers, we combine the advantages of accelerated digital processes with the trust of personal discussions.

Specialist for exclusive colored gemstones

At ARNOLDI INTERNATIONAL we put special emphasis on attention to our customers’ wishes. Therefore, we are personally dedicated to personally and carefully monitoring all aspects, from selective purchasing and meticulous production to the final sparkling result. By performing the production process at our own premises in-house, we profit from the opportunity to meet our clients’ demands as flexible and individual as possible.

Our mission: Perfection – MADE IN GERMANY by ARNOLDI INTERNATIONAL

Specialist in diamonds

As a traditional family business, we have been dealing exclusively with diamonds for five generations. As the oldest diamond grinding shop in Germany, we therefore have many years of rich experience.

In connection with the guiding principle "The diamond business is as hard as the matter itself" we have not only mastered the most difficult times in the more than 125-year company history, but also understood how to become the epitome of serious grading and fine cut execution. Whenever there was and is fighting for the serious diamond business, we were and are always to be found in the front row.

Specialist in opals

Founded in today's "Opal Village" Kirschweiler, Emil Weis Opals is one of the very first opal cutting workshops in the gemstone metropolis of Idar-Oberstein. In what is demonstrably the oldest opal cutting workshop in the world, all types of opal are still cut into fine gemstones today.

With special know-how, the Emil Weis Opals company also supplies fine individual stones and single-cut work for individual orders from jewellers and goldsmiths. Due to the decades-long tradition of being active in opal mining locally and additionally acquiring raw opal from all producing sources worldwide, the company is able to replace almost any type of opal or to supply matching stones to an existing piece of jewellery.