Gina Rinehart is an Australian iron ore magnate whose net worth jumped $6 billion to $15 billion, making her the seventh richest woman in the world. Featuring on this list for the past few years, she is also the richest person in her country and the 69th richest in the world. Unlike manyof the other women on this list, 63-year-old Rinehart has actively built her fortune instead of inheriting it. Rinehart rebuilt her late father's bankrupted Hancock Prospecting and turned it into a large profitable conglomerate. Her Roy Hill project, an iron ore mine in Western Australia, has shipped 30 million tons of iron ore in its first 14 months of production. Rinehart is currently involved in a bitter family trust battle in court with three of her four children. In Western Australia, a mountain range has been named Hancock Range in honor of her family and its contribution to the mining industry in the region.