We covered the basics of rare earth elements (REEs) in Rare Earth Elements 101 — what they are, their main types, and their role in modern technology. At the end of that piece, we promised a closer look at the supply chain and development potential. This time, we’re zooming in on what matters most for Indonesia: where the country’s rare earth downstream push actually stands today.
The issue has gained urgency as China’s export restrictions on rare earths push many countries — Indonesia included — to accelerate their path toward supply chain independence for this strategic mineral group.
Indonesia’s Rare Earth Potential
Indonesia is often cited as holding significant rare earth potential, though this remains debated among experts. Most of Indonesia’s rare earth deposits aren’t found as a primary ore — they occur as a byproduct of other mining activities, particularly tin mining.
Even so, this potential is still considered strategically important. State tin miner PT Timah supplies rare earth element raw material recovered from tin processing residue, which carries significant economic value once processed further. Byproduct minerals from tin mining are said to increase in value by dozens of times once refined into high-value products such as power generation components, solar panels, and electric vehicle materials.
Not everyone shares this optimism, though. The Indonesian Mining Professionals Association (Perhapi) has raised doubts about the validity of some national rare earth potential data, arguing that Indonesia’s critical mineral distribution mapping hasn’t been compiled to proper reporting standards. This underscores that geological data validation remains essential homework before Indonesia can build a mature roadmap for its REE industry.
Progress on National Rare Earth Downstream Development
The Indonesian government is accelerating its rare earth downstream agenda as part of a broader strategic minerals industry push. President Prabowo Subianto is scheduled to inaugurate a rare earth research and industrial facility on May 20, 2026, involving a partnership between PT Timah as raw material supplier and PT Perusahaan Mineral Nasional (Perminas) as the downstream processor.
On the economic side, the projections are notable. Indonesia’s Mineral Industry Board (BIM) estimates the market value of rare earth downstream processing could reach roughly US$7.42 billion (around IDR 124.76 trillion) by 2030. REEs are also becoming an increasingly critical bargaining chip in global trade — China, for instance, has used them as leverage in international negotiations.
Rare earths were also a major talking point at METCONNEX 2026, reflecting the government’s push to accelerate downstream processing and strategic industry development. Establishing the Mineral Industry Board (BIM) and Perminas is seen as essential to ensure the country has professionals capable of exploring, mining, and processing rare earths using current technology, aligned with the government’s broader push.
Challenges Facing Rare Earth Development in Indonesia
Behind this potential, Indonesia faces several real challenges:
- Limited geological data — data on rare earth content in Indonesia’s soil systems remains far more limited than in other countries.
- Processing technology — Indonesia still needs up-to-date exploration and processing technology, given how complex it is to extract REEs from byproduct minerals.
- Data standard validation — as Perhapi has pointed out, the national critical mineral distribution map needs improvement so downstream policy is grounded in accurate data.
- Workforce readiness — Indonesia needs to build a workforce competent enough to keep pace with new technology adoption in mining, including the application of artificial intelligence.
Conclusion
Indonesia has a real opportunity to enter the global rare earth supply chain, largely through byproduct minerals from its already-established tin industry. But that potential can only be realized with accurate geological data validation, investment in processing technology, and a skilled workforce in metallurgy and mining.
The downstream project involving PT Timah and Perminas marks an early step worth watching closely, given the scale of economic value it could generate for Indonesia’s metallurgy and minerals industry in the coming years.
