Four Metals, One Fragile System: Inside the Hidden Supply Risks Powering Screens, Chips, and Clean Energy

Highlights

• New study examines four critical materials—cerium, gallium, indium, and iridium—revealing stable current supply but structural vulnerabilities driven by China's 90% control of gallium, South Africa's iridium monopoly, and concentrated recycling systems.
• Geopolitical tensions and trade restrictions, not mining shortages, now pose the primary supply disruption risk for semiconductors, displays, and clean energy technologies as recycling becomes strategic infrastructure.
• Concentration risk across a handful of regions creates systemic exposure: gallium faces export controls, indium recycling is China-dependent, and iridium demand surges from hydrogen tech.

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A new analysis led by Guillaume Gélinas of Vital Materials (opens in a new tab) (Cupertino, CA) examines (opens in a new tab) four critical materials—cerium, gallium, indium, and iridium—and delivers a clear message: the global technology economy rests on a supply chain that is stable today, but structurally vulnerable tomorrow. Drawing on production data, recycling flows, and geopolitical developments, the study shows how China’s dominance in gallium and indium, South Africa’s control of iridium, and uneven recycling systems are quietly shaping the future of displays, semiconductors, and clean energy technologies.

How the Study Was Built

The paper synthesizes historical production trends, end-use demand, and supply chain dynamics across extraction and recycling. It focuses on real-world constraints—geology, refining bottlenecks, trade policy, and material efficiency—rather than forecasting models, offering a grounded risk assessment of four essential inputs to modern electronics.

Key Findings—A Patchwork of Risk

Not all materials carry equal risk. Cerium appears relatively secure, supported by abundant supply and mature recycling. Gallium is the geopolitical flashpoint: China produces roughly 90% of global output, and export controls tied to U.S.-China tensions have already disrupted semiconductor supply chains. Indium, critical for display coatings (ITO), is heavily recycled but increasingly concentrated in China’s ecosystem. Iridium stands apart—rare, expensive, and largely sourced from South Africa—amid rising demand from hydrogen technologies that could further tighten supply.

What It Means for Investors

This is not a story of immediate shortage—it is a story of concentration risk. Supply disruptions will increasingly be driven by policy decisions, trade restrictions, and competing technologies, rather than just by mining output. Recycling is no longer optional; it is strategic infrastructure.

Limitations and What Comes Next

The study is high-level and does not model future shortages or substitution pathways. It assumes continued recycling efficiency and does not fully account for Western policy responses or new refining capacity outside China.

Bottom Line—Stable Today, Strategic Risk Tomorrow

The system works—for now. But the concentration of supply, rising demand, and geopolitical tension are tightening the margin for error.

REEx takeaway: when supply chains depend on a handful of regions and processes, stability is not strength—it is exposure.

Citation: Gélinas, G., Availability and Sourcing of Cerium, Gallium, Indium and Iridium, SID Digest 2025.