1. A Selection Based on Precision and Science

All our diamonds are GIA-certified from 0.25 ct upward. Our selection follows the proportions established by Marcel Tolkowsky, mathematician and diamond dealer, who in 1919 defined the foundations of the modern round brilliant cut. His work aimed to optimize the balance between brilliance, fire, scintillation, and dispersion through rigorous optical calculation.

This is why we select only diamonds graded Excellent to Very Good, with no fluorescence, preserving a natural and balanced light.

 

2. 35 Years of Experience in Diamond Purchasing

We work directly with the world diamond exchange and major international cutting houses. These long-standing relationships give us access to diamonds selected for their coherence and quality.

We operate in a just‑in‑time manner, without dormant stock: every diamond is acquired specifically for the client at the current market price. This demanding approach is supported by decades of experience and a refined understanding of the market.

 

3. Swiss Manufacturing: Precise and Carefully Executed

All our creations are crafted in Switzerland, in workshops whose expertise we respect and admire. This reflects our intention to combine rigorous gemmological selection with impeccable execution.

The mountings are designed for balance, comfort, and durability. Every step of the setting process is carefully controlled, ensuring consistent finishing and optimal stone security.

 

4. A Considered Ethical Approach

Our diamonds comply with the Kimberley Process, ensuring strict control of their origin.

For coloured stones, pearls, and meteorites, we work with trusted partners we know personally. We sometimes carry out the selection directly at the source to better understand each material’s story and nature.

 

5. A Vision: Combining Excellence and Fairness

Our goal is simple: to offer a level of quality that is consistent, refined, and durable. Through our gemmological expertise, our network of partners, and our Swiss manufacturing, we provide a high standard of excellence at the fairest possible price.

© 2004 - 2024 diams SA. All Rights Reserved. Kimberley Process: In accordance with United Nations resolutions, the diamonds sold on this site come from legal sources that are not involved in conflict financing. diams SA guarantees that its diamonds, to the best of its knowledge and according to the written guarantees given to it by its suppliers, are not "diamonds of the war".