WASHINGTON, December 28, 2025 — The United States could be sitting on a treasure trove of critical minerals, largely untapped and currently treated as waste. A new statistical study led by Elizabeth Holley and her research team reveals that valuable materials could be recovered as byproducts from existing U.S. metal mines, potentially lessening the nation’s dependence on foreign imports and reshaping the future of domestic manufacturing.
Untapped Potential: Mining Waste Holds Key to Supply Chain Security
Table of Contents
Recovering even a small percentage of these overlooked minerals could significantly impact U.S. supply chains.
- Recovering 90 percent of critical mineral byproducts could meet nearly all U.S. needs.
- Even a 1 percent recovery rate would substantially reduce reliance on imports.
- These minerals are often discarded as waste during the processing of metals like copper, gold, and nickel.
- Recovering these byproducts could generate more revenue than selling the primary metals themselves.
- The findings highlight a largely untapped economic and strategic opportunity for the U.S.
Critical mineral byproducts—elements like cobalt, nickel, manganese, lithium, tellurium, and germanium—occur naturally alongside more commonly mined metals. Because these secondary minerals aren’t the primary target, they’re often separated and discarded during processing. But according to the researchers, even recovering small amounts of these overlooked materials could have a major impact.
The study found that recovering 90 percent of these byproducts “could meet nearly all U.S. critical mineral needs; one percent recovery would substantially reduce import reliance for most elements evaluated.” This suggests that even modest improvements in recovery technology could dramatically reduce dependence on overseas sources.
Why Critical Minerals Matter
Critical minerals are essential to both the economy and national security, yet their supply is vulnerable due to limited domestic production and geopolitical instability. These elements are integral to modern technology, powering everything from rechargeable batteries in electric vehicles and magnets in wind turbines to semiconductors for electronics and solar panels for renewable energy.
What happens when the supply of these minerals is disrupted? Demand for these materials is surging as clean energy technologies expand, but many are currently imported from regions facing political tension or trade uncertainty. Developing entirely new mines is a decades-long process, making alternative domestic sources particularly attractive.
How the Study Was Conducted
To estimate the potential for recovery, Holley and her team combined two extensive datasets. One tracked the main commodities produced at federally permitted U.S. metal mines, while the other contained detailed geochemical measurements of 70 critical minerals found in ore samples nationwide.
By cross-referencing production data with mineral chemistry data, the team determined how much of each critical mineral is currently being mined and processed but not recovered. Instead, these materials end up in mine waste, known as tailings, which requires careful storage and monitoring to prevent environmental harm.
In many instances, the study revealed that recovering less than 10 percent of these byproducts would generate a higher total dollar value than the primary metals currently being sold by U.S. mines. This indicates that what is currently considered waste could become a significant economic asset.
Beyond Economics: Strategic and Environmental Gains
The benefits of recovering critical mineral byproducts extend beyond financial gains. Reducing import dependence would bolster supply security for key industries—energy, technology, and defense—and shield the U.S. from disruptions caused by international conflicts or trade restrictions.
There are also environmental advantages. Recovering valuable minerals instead of discarding them would lessen the volume and long-term impact of mine waste. It could also unlock new opportunities to reuse processed materials in construction and other applications.
Despite the potential, challenges remain. Recovering small amounts of minerals from complex ore mixtures requires advanced technology, additional processing steps, and supportive policies. As Holley explained, the key lies in making recovery practical and cost-effective at scale.
Nevertheless, the findings point to a substantial, largely untapped opportunity. Active U.S. mines are already handling the materials needed for batteries, clean energy systems, and high-tech manufacturing. With targeted investment, research, and policy incentives, these hidden byproducts could transform into a powerful domestic resource, rather than being discarded as waste.
