Expertise Jewelry

Ramon Cortes, the founder and Managing Director of, qualified as a gemmologist from one of the most prestigious laboratories in the world, the G.I.A. (Gemmological Institute of America). With more than 25 years of experience in the fields of jewellery and watches, he has acquired unique knowledge and expertise.  About Us

We carry out valuations on antique and modern jewellery, diamonds, gems and precious stones, pearls and watches. In a market which is constantly evolving, we work alongside a prestigious auction house and this allows us to keep right up to date with the trends and values of jewels and watches.

Our work is to identify and then proceed to estimate the value of pieces.

We offer two types of valuation :

  • Valuation for insurance purposes (replacement value)
  • Valuation for sales (market value)

These valuations can be carried out for insurers, notaries, lawyers or private individuals.

All valuations are carried out by a GIA gemmological expert.

If it is not possible for you to go to one of our offices, our mobile gemmology laboratory allows us to carry out on-site evaluations.

Our prices are available upon request :

© 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".