Heavy Rare Earth Elements Reveal China's Hidden Chokepoint Beyond Dysprosium and Terbium

Highlights

• USGS ranks lutetium third among 84 minerals by U.S. supply-disruption risk, with a $2.059 billion annual GDP impact model
• China placed gadolinium, lutetium, and yttrium under export licensing in April 2025, creating functional leverage over downstream industries
• Separation of adjacent lanthanides—differing by only ~0.01 angstrom in ionic radius—is the true technical and strategic moat
• DoD and CHIPS Act funding is backing MP Materials and USA Rare Earth to build domestic heavy rare earth separation capacity
• Obscure HREEs like erbium, thulium, and holmium underpin fiber optics, nuclear control rods, and medical imaging despite tiny market volumes