Our sustainable commitments 2020-2025

Since 1999, the Gemmes-Tech group has been providing watch brands with its expertise and know-how in stones and mother-of-pearl. Today we are committed to becoming a reference in terms of sustainable and fair development.

We support watch brands in making the luxury industry more transparent, sustainable and fair. The pleasure of the consumer is complete when it goes hand in hand with that of the craftsmen who carry out exceptional work on exceptional materials. It is also an essential condition for the protection of our environment in the long term. Numerous courageous initiatives have already been born throughout the world in this direction, both for minerals, precious stones, precious metals and mother-of-pearl. Gemmes-Tech is aware of them and supports and encourages them locally through concrete initiatives.

Ornamental stones

For each of the more than 300 minerals at the heart of its know-how, Gemmes-Tech communicates the geographical origin and the respect of sustainable development criteria according to international standards.

In supply chains where sustainable and responsible development is not yet guaranteed, alternatives are proposed.

Gemmes-Tech develops projects to guarantee traceability and responsibility as close as possible to the mine.


Gemmes-Tech is a certified member of the RJC, Responsible Jewelry Council – n°000 1272. Gemmes-Tech’s gemstone department provides top cut calibrated diamonds and baguettes to IF-VVS, TW watchmaker level with or without fluorescence.

In addition to this certification, the Gemmes-Tech group supplies diamonds, even small diameters, of certified sustainable and responsible origin: CanadamarkTM.

Colored stones

Since 1999, Gemmes-Tech has been a supplier of colored stones specifically calibrated for the watchmaking and jewelry industries in terms of quality, dimension and colorimetry. All Gemmes-Tech colored stones are supplied with corresponding certificates of origin and a sustainability assessment.

To maximize quality, responsiveness and competitiveness, Gemmes-Tech’s manufacturing facility integrates the following skills

  • Dedicated jewelry project manager
  • Prospecting, purchasing and selection of stones
  • Control, gemmology
  • Lapidary, retouching
  • Setting

We support our clients in creating the most demanding gradations.
Do not hesitate to ask for our color chart – Colored Stone Chart – to adjust your creations with precision.


In addition to our ROC certification, the Gemmes-Tech group supplies itself with responsible gold: local projects for the preservation of the environment and the protection of children in Peru.

An integral approach

Consideration of sustainable development from the establishment of the specifications. Consultation of academics involved in sustainable development.

Selection and choice of new partners as close as possible to the mine or fishing port. No intermediaries. Increase of the price paid to the producer. Increase of the producer’s added value.

Written commitment from new suppliers in terms of sustainable development and origin.

Except during the COVID-19 period, visit and audit of our suppliers on the respect of their commitment.