The Democratic Republic of Congo (DRC) has added the Rubaya coltan mine, which is held by Rwandan-backed rebels and contains one of the richest tantalum deposits in the world, to a list of strategic assets being offered to the U. S. This decision is part of a minerals cooperation framework aiming to enhance DRC-U. S. relations, and was confirmed by a senior Congolese official and a U. S. diplomat during a meeting in Washington on February 5.
Despite its control by the AFC/M23 rebels, the DRC hopes to attract U. S. investment to exploit the mine for its valuable tantalum, which is essential for various industries, including electronics and aerospace. The DRC estimates it will need between $50 million and $150 million to restart the mine, anticipating a quick return on investment due to rising global demand. The U. S. is interested in accessing these natural resources to compete against China’s influence in Africa.
Rubaya contributes around 15% of the world’s coltan output and features a tantalum concentration of 20–40%. It is manually mined by local workers, who earn very little. The U. N. reports thatthe rebels earn substantial monthly revenues from the mine, which they reportedly use to finance their activities.
The M23 group and its political affiliate are under U. S. sanctions and are not part of a peace agreement negotiated in December, and there continue to be violent clashes in the region. Critics of the minerals framework argue that it is flawed and inappropriate to negotiate new mineral partnerships when conflicts persist. An official from the AFC/M23 stated their primary goal is not control of the mines but rather the liberation of their people.
Moreover, the DRC’s move to offer Rubaya to the U. S. indicates an intention to potentially have U. S. forces help regain control of the area for the Congolese government. However, there are questions regarding the actual ownership of the mine, as a private party currently holds the mining title.
The U. S. State Department indicated that the DRC provided a list of strategic assets but did not disclose specific details. U. S. companies are invited to express interest in these projects, which include the Manono lithium deposit, copper-cobalt complexes, and several gold prospects, as part of efforts to diminish China’s influence in Congolese minerals.
With information from Reuters

