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Oliver Friesen, Guardian Metal Resources

Oliver Friesen has spent over a decade in mineral exploration, from Barrick Gold in Nevada to building a tungsten developer.

Oliver Friesen / Guardian Metal Resources Plc

Oliver Friesen has spent over a decade in mineral exploration, from Barrick Gold in Nevada to building a tungsten developer.

23:23

Published 21 July 2026. Hosted on Buzzsprout.

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