By: Ecofin agency

Guinea's Minister of Mines, Bouna Sylla, announced in July 2025 the launch of the Guinea Bauxite Index (GBX), a national benchmark price intended to bring transparency to pricing the country's top export. However, turning this ambition into a credible tool will require overcoming several challenges, Anthony Everiss, a principal analyst at the London-based commodities consulting firm CRU, told Ecofin Agency.

According to Everiss, an aluminum specialist, sales contracts for Guinean bauxite are currently negotiated through opaque channels or between affiliated companies. To make the GBX operational, it must account for several technical parameters, including adjustments for alumina content and the level of reactive silica.

Guinean bauxite is notable for its low reactive silica content, which makes it ideal for China's low-temperature alumina refineries. Beijing relies heavily on Conakry, as nearly 70% of its bauxite imports in 2024 came from Guinea. Everiss said the index's implementation will "require adjusting prices based on alumina content, silica rate, and logistical costs... The goal would be to publish transparent and verifiable weekly or monthly prices."

Market Participation is Key

Beyond technical conditions, the index's success depends on the participation of key market players. "This means involving all stakeholders, such as producers in Guinea, including Chinese joint ventures and other emerging projects, alumina refineries in Asia, and traders," Everiss said. This collective participation is essential to give the future index liquidity through regular, significant transactions.

Unlike alumina, which has a widely followed benchmark index, bauxite has never managed to establish itself as a quoted commodity with a recognized price. Previous attempts at an index, including one by the CRU, relied on partial customs data due to a lack of reliable information directly from the market, limiting their adoption.

Everiss believes that mining companies in Guinea could find the national index beneficial. It would help establish a more representative market price that reflects the specific qualities of Guinean bauxite while rewarding producers for higher-quality ore.

The government plans to launch the GBX "in the coming months." For Conakry, the stakes are high: a credible index could increase public revenue and give the state unprecedented leverage over a market it already dominates.