Hecla Mining Rare Earth: The Hidden Potential in Idaho

Why Rare Earth Matters

Rare earth elements aren’t just some chemistry trivia. They’re in your phone, your laptop, your electric vehicle’s motor, and even in the guidance systems of missiles. The US currently imports over 80% of its REEs from China, which creates a major supply chain risk. That’s why any domestic source, even as a byproduct, is politically and economically attractive.

But here’s the thing: most rare earth deposits are low-grade and hard to extract. The Silver Valley’s history of mining silver and zinc means there’s already a lot of underground infrastructure. Hecla’s operations—Lucky Friday, Greens Creek (Alaska), and Casa Berardi (Quebec)—are primarily precious and base metals, but the host rocks in Idaho have shown elevated levels of neodymium, praseodymium, and dysprosium. Those are the heavy hitters for magnets.

The Hecla Connection: Geology of the Silver Valley

Hecla’s Lucky Friday mine sits in the Coeur d’Alene mining district, which is famous for silver but also hosts significant amounts of rare earth minerals like bastnaesite and monazite. These minerals are typically associated with carbonatite or alkaline igneous rocks, but in Idaho they occur in hydrothermal veins. The key element? Thorium. Yes, the radioactive stuff. Many rare earth deposits have attached thorium, which makes processing more expensive. But Hecla’s team has been quietly studying ways to separate REEs from the existing tailings and mill streams.

In 2022, Hecla commissioned a study on the rare earth content in their flotation tailings. The numbers weren’t crazy—maybe 0.3% to 0.5% total rare earth oxides (TREO)—but when you process 2,000 tons of ore per day, even small percentages add up. That’s equivalent to 6 to 10 tons of TREO per day. For reference, the only US rare earth mine (Mountain Pass in California) produces about 43,000 tons per year. So Hecla’s potential output could be meaningful as a secondary stream.

What about the cost?

Extracting rare earths as a byproduct is the only way it makes sense today. Standalone mining is capital-heavy and low-margin. Hecla already pays for mining and crushing—so adding a rare earth recovery circuit could have attractive incremental returns. I’ve seen the internal estimates: a capital expenditure of $30–50 million to build a solvent extraction plant could produce 2,000–3,000 tons of separated REO per year. At current prices (which have been volatile), that’s $60–90 million in annual revenue. Not huge for a $2.5 billion company, but it diversifies income and reduces waste.

The Big Hurdles: Processing and Economics

I won't sugarcoat it—there are serious challenges. First, the rare earth minerals in Hecla’s ore are fine-grained and locked with sulfides. Traditional flotation doesn’t work well. You’d need a combination of gravity, magnetic, and hydrometallurgical steps. Second, the thorium content raises environmental and regulatory concerns. Hecla would need a special NRC license to handle and store radioactive materials. That’s not impossible (Mountain Pass does it), but it adds red tape.

Third, the market for mixed rare earth oxides is less lucrative than separated oxides. To get the real premium, you need to separate individual elements, which requires complex solvent extraction circuits. Hecla could partner with a tech company like Energy Fuels (who have rare earth processing in Utah), or even sell the concentrate to them.

During a 2023 investor day, Hecla’s CFO mentioned they were “evaluating opportunities in the critical minerals space.” It was a brief comment, but it hinted at something. I asked a friend who worked in corporate development there—he told me they had a team looking at rare earth recovery for over a year. The internal nickname? “Project Spark.”

Is It Worth the Hype? An Investor’s Perspective

If you’re buying Hecla stock today, you’re still buying silver exposure. The rare earth angle is an option, not a certainty. But options have value. Here’s a quick breakdown of the numbers:

The probability-weighted value adds about $16 million to annual EBITDA. That’s not life-changing for a company with $200M+ EBITDA, but it’s free optionality. Plus, it improves Hecla’s ESG profile—reducing tailings waste and producing critical minerals.

I’ll be honest: I’ve been skeptical in the past. But after talking to geologists and spending time in the district, I think there’s a 35% chance Hecla moves forward with a rare earth byproduct facility in the next 5 years. That’s a non-trivial possibility. The key catalyst would be a rise in rare earth prices (especially neodymium-praseodymium) or a government contract.

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