The Democratic Republic of Congo is taking a new approach to its diamond trade. Instead of shipping most of its rough stones abroad, the country is partnering with a Swiss firm to cut, certify, and sell gems directly from within its borders. The move is designed to boost transparency, curb smuggling, and keep a larger share of the industry's profits at home.
Congo's mines ministry announced a deal with Switzerland-based ADEX Platform to create a 50-50 joint venture called ADEX RDC SA. The venture will build a cutting and jewelry facility and a digital marketplace for direct sales to overseas buyers. The state-run Mining Fund for Future Generations (FOMIN) will be Congo's partner in the deal.
Why Congo Is Changing Its Diamond Strategy
The timing of the announcement is significant. Official diamond output in Congo has fallen sharply, from about 13 million carats in 2021 to 8.1 million in 2025. That decline means the government can no longer rely on rising volumes to generate revenue. Instead, it needs to earn more from each stone it sells.
By cutting and polishing diamonds locally, Congo can capture value that currently flows to foreign processors. The country also hopes that a digital sales platform will make it harder for high-quality stones to disappear into off-book middlemen before taxes and royalties are paid. The system is intended to record who produced each stone and who bought it, creating a transparent chain from mine to buyer.
This is not Congo's first attempt to tighten control over its mineral wealth. Earlier this year, the country tightened cobalt export quotas, forfeiting unused rights by June 30, in a bid to manage supply and boost prices. The diamond venture follows a similar logic: use policy and partnerships to extract more value from natural resources.
The Challenge of Artisanal Miners
Pulling off the plan is complicated. Around 85% of Congo's diamonds come from artisanal miners—individuals or small groups working with basic tools. The industrial side is led by SACIM, a China-backed joint venture, which produced just over 1 million carats last year.
For the new system to work, it must be simple enough for small-scale miners to use. If the digital marketplace and certification process are too complex or slow, most stones will still flow through informal channels. Artisanal miners typically need fast payments and fair pricing, and they often lack access to formal banking or digital platforms.
The venture will need to offer trusted verification that is easy to access, possibly through mobile technology or local agents. Without that, the plan risks benefiting only large industrial operators while leaving the majority of Congo's diamond production outside the formal system.
What It Means for Investors
For investors, the deal signals that Congo is serious about moving up the diamond value chain. If successful, the country could reduce its dependence on rough stone exports and generate more stable revenue from cutting, polishing, and jewelry making.
That could make diamond revenue less tied to how many carats the country digs up. With output already falling, the focus on verified value is a logical hedge. However, the success of the venture depends on execution. The artisanal sector is hard to regulate, and smuggling has been a persistent problem in Congo's mining industry.
Investors should watch whether the platform can attract enough buyers to offer competitive prices for artisanal miners. If it can, the venture could gradually shift more production into the formal economy. If not, the impact on Congo's overall diamond revenue may be limited.
The broader context is that commodity-dependent economies are increasingly looking for ways to capture more value domestically. Congo's approach mirrors efforts in other African nations to process minerals locally rather than export them raw. The difference here is the scale of the artisanal sector, which makes the challenge both bigger and more complex.
For now, the deal is a sign of intent. The real test will come when the cutting facility opens and the digital marketplace goes live. Investors will want to see whether the system can deliver on its promises of transparency, fair pricing, and reduced smuggling.
