As the year comes to a close and we prepare to extend our coverage further, we are revisiting our most popular expert interviews from 2012.

One of the world's leading experts on industrial chemicals explains the convoluted market for fluorspar, a component of many household products.

Copper is often referred to as "Dr. Copper," the metal with a Ph.D. in economics.

In this exclusive Critical Metals Report interview, learn which other metals and minerals are getting the market's attention with positive fundamentals.

Mike Niehuser isn't a rare earth expert per se, but the Beacon Rock Research founder says many of the same investment principles hold true for resource stocks across sectors.

Mike Niehuser isn't a rare earth expert per se, but the Beacon Rock Research founder says many of the same investment principles hold true for resource stocks across sectors.

In this Critical Metals Report exclusive, Chernin transports us from Morocco to the dazzling Newfoundland coast, to "Tungsten Town" in Northern Canada.

Got a rare earth deposit? Great. Got a mine? Even better.

In the next few weeks, China's government will begin stockpiling roughly ¥6B worth of rare earth elements.

Lisa Reisman describes herself as a "classic libertarian," but the managing editor of MetalMiner.com nonetheless believes government has a role to play in protecting and developing domestic supplies of critical metals. In this exclusive Critical Metals Report interview, Reisman argues for private/public partnerships and explains why today's low prices don't phase her—or surprise her.

Flakes are king in the graphite space, where large flake commands a substantial premium. But the path to production can be long and twisted, with many moving parts.

In this exclusive Critical Metals Report interview, Chris Berry of House Mountain Partners discusses what really matters in a rare earth element company, and why investors should exercise patience.