• Idaho National Laboratory geologist Travis McLing explains that rare earths aren’t truly rare, but economically recoverable deposits and complete supply chains are extremely constrained—especially for heavy rare earths like dysprosium and terbium that are critical to defense applications.
• McLing emphasizes that mineralized occurrences don’t equal economic deposits, and the U.S. cannot mine its way out of rare earth dependence without synchronized separation, refining, metallization, and manufacturing capacity working together.
• INL is bridging the gap between lab research and industrial execution through pilot centers for separation and refining, representing the institutional coordination America needs to solve its rare earth challenge through geology, engineering, and industrial policy.

In a new Rare Earth Exchanges™ podcast episode (opens in a new tab), Idaho National Laboratory (opens in a new tab) geologist Travis McLing (opens in a new tab) delivers one of the clearest explanations yet of why rare earths are not truly “rare,” but economically recoverable deposits most certainly are. The conversation moves from deep geology to national strategy, showing how unusual magmatic processes, deposit size, grade, mineralogy, and downstream bottlenecks all shape whether a rare earth project ever becomes viable. McLing’s role matters: INL says its geoscience work spans critical materials characterization, extraction, and national-security-linked supply chain research.

McLing’s central message is one Rare EarthExchanges™ has emphasized since the company's launch in late 2024: geology is only the beginning. The prominent geologist explains that light rare earth deposits, such as carbonatite-hosted systems, can be large, but heavy rare earths are typically harder to find, harder to process, and far more constrained by market structure. In practical terms, the magnet economy does not run on “total rare earth oxide” headlines. It runs on the specific availability of elements such as dysprosium and terbium, which are essential for high-performance, high-temperature magnet applications tied to defense and advanced industry.

Just as important, McLing cuts through a dangerous misconception in the upstream market: a mineralized occurrence is not the same thing as an economic deposit, and an economic deposit is not the same thing as a bankable supply chain. The Idaho state geologist who studied rare earth elements for his thesis argues that the United States cannot mine its way out of rare earth dependence without synchronized separation, refining,metallization, and manufacturing capacity.

 A key argument for more intense industrial policy in the West, including America.  That view aligns closely with INL’s stated mission to support critical materials from characterization through deployment and to work with partners on extraction, flow sheets, piloting, and scale-up.

The deeper significance of the interview is this: McLing represents the kind of institution the United States needs at the center of its rare earth response. INL is not merely studying rocks. It is helping bridge the deadly gap between lab insight and industrial execution. This includes the establishment of pilot centers for rare earth separation and refining. 

For investors, policymakers, and entrepreneurs, the podcast is a reminder that America’s rare earth challenge will not be solved by slogans. It will be solved by geology, engineering, and coordinated industrial policy arriving at the station at the same time. 

Investors seeking to better understand this complex space should consider a relationship with McLing and INL.  See the podcast (opens in a new tab).