Les Ateliers MC is entirely compliant with the rules of the diamond and colored gemstone industry. We only buy rough or cut colored precious stones from suppliers with whom we have had a long partnership and who have a very fine reputation in the business. We exercise our quality control (QC) on a regular basis to be compliant beforehand with these suppliers on the mining supply of stones, in order to ensure that all the new process are consistent with legal provisions currently in use in the market. The majority of our suppliers are members of respected precious stone associations, thus providing us additional protection. And to ensure that we are aware of all the potential risks, we secure our supplies from rough diamond producers with Kimberley certification. Regarding precious metals, we only buy from suppliers who are approved by the PMS( Official Precious Metals Control).