Diamond and gemstone sourcing Diamonds are only purchased from the few suppliers who completely respect and implement the Kimberley Process certifi- cation system. Certification guarantees that diamonds can be proven to originate from conflict-free regions and from legal trade. Countries, companies, and merchants who do not use this certification system in its entirety are excluded from trade. In addition, only long-term partners who comply with the CIBJO (Confédération Internationale de la Bijouterie, Joaillerie, Orfèvrerie des diamants, perles, et pierres; The World Jewellery Confedera- tion) guidelines as well as the Kimberley Process are used, in or- der to eliminate any quality and sourcing risks.