From her Perth headquarters, Rinehart has quietly built the largest portfolio of rare-earth investments outside China, as per a Bloomberg report. Two decades after her first fortune in iron ore, she’s now worth $32.9 billion, her holdings in four listed rare-earth companies alone valued at $1.8 billion. The numbers place her among the world’s ten richest women, behind India’s Savitri Jindal and philanthropist MacKenzie Scott.Her rise coincides with a global scramble to diversify mineral supply chains. Chin ...