Marnie Finlayson is the battery minerals boss leading Rio Tinto into the decarbonisation era. Raleigh Finlayson is a precious metal stayer chasing more success in gold, where his sights are set on a 126-year-old mine.

The sister and brother grew up tormenting one another on a dusty sheep station in Western Australia. They embody the old-meets-new reshaping of WA’s resources industry in their vast childhood backyard, the Goldfields.