The Diamond – Perfection for Jewelers
Diamonds have always been an integral part of our portfolio and have been expanded to become a core part of our offering in recent years.
With our many years of experience and a global dealer network, we are at your side as a competent partner – for every request, from planning to implementation.

Strict quality controls for the highest demands
Each diamond undergoes a rigorous testing process in which the clarity and inclusion pattern of each stone are assessed in detail. Only the best stones make it into our range - exclusively for the B2B sector.
Our extensive warehouse offers you an exclusive selection, with a clear focus on larger to very large diamonds. From classic round brilliants to a variety of extraordinary fantasy cuts, we cover the entire spectrum. Our range is complemented by rare individual pieces in fascinating fantasy colors - perfect for jewelers looking for uniqueness.

Why Gerhard Hahn?
- Over 120 years of experience in rare gemstones.
- Fast processing of your requests – delivery even within 24 hours.
- Direct imports from the best regions of origin worldwide.
- Personal advice and no minimum order quantities.