Supply Chain

Rhodium Supply Chain: From Mine to Market

Rhodium has the most constrained supply of any precious metal still required in large industrial quantities. Total global production is only ~25 tonnes/year, entirely as a co-product of platinum and palladium mining, primarily in South Africa (~80%). Rhodium cannot be mined independently. The dominant use (~80%) is in three-way catalytic converters for gasoline vehicles, where rhodium uniquely catalyzes the reduction of nitrogen oxides (NOx) to nitrogen and oxygen. No other element can substitute for this function. The supply chain is identical to platinum: South African Bushveld Complex mining, flotation, smelting, base metal refining, and precious metal refining. Rhodiums extreme price volatility reflects the intersection of inelastic supply (linked to platinum mining) and inelastic demand (no substitute in autocatalysts) in a tiny market.

Production Geography

Global Rhodium production is led by South Africa, which accounts for approximately 80% of world output, followed by Russia. The full list of major producing nations includes South Africa, Russia, Zimbabwe, Canada. This geographic concentration means that disruptions in key producing regions can have outsized impacts on global supply and pricing.

Extraction Methods

Rhodium is extracted using the following primary methods:

• Byproduct of platinum/palladium mining

Processing and Intermediate Products

Rhodium is primarily sourced from Merensky Reef, UG2 Chromitite, Platreef. After extraction, the raw material undergoes multiple processing steps including beneficiation, chemical treatment, and refining to reach the purity levels required by downstream industries. Typical ore grades range from Byproduct - ~0.2 g/t in PGM ores.

Key Supply Chain Participants

The Rhodium supply chain involves these major companies:

Supply Chain Vulnerabilities

Key vulnerabilities in the Rhodium supply chain include concentration of 80% of production in South Africa, limited processing capacity diversification, and long lead times for new mining projects. The high supply risk rating reflects the severity of these concentration risks and the difficulty of rapidly establishing alternative supply sources.