Mining magnate Gina Rinehart is set to appear in the WA Supreme Court today for the first day of a major legal challenge to her multi-billion-dollar empire that’s been more than a decade in the making. Multiple parties are challenging her rights to mining royalties and the ownership of the Pilbara iron ore mine Hope Downs. The main challenger is fellow billionaire Angela Bennett and her company Wright Prospecting. Bennett is the daughter of Peter Wright – aka the late business partner of Rinehart’s late father, Lang Hancock. Reports say that Bennett is fighting for dividends worth hundreds of millions from Hope Downs, along with a share in part of the site that could be worth billions. Rinehart’s 2 oldest children are also fighting for money they claim their grandfather left to them. The ‘clash of the dynasties’ court case could run for about 3-4 months, so buckle up…