•China's Hunan Nonferrous Metals owns Canada's Beaver Brook mine, the largest potential North American producer of antimony, and shuttered it in early 2023.
•Antimony prices surged from approximately $5,900 per tonne to over $50,000 following Beijing's export controls.
•Antimony is a critical mineral for defense industries, used in ammunition, night-vision goggles, and missile seekers.
