Dismissing the ruling as 'politically motivated', the mining tycoon is to make one last attempt to overturn his conviction – at the Swiss federal court, The Swiss appeal court's upholding of a guilty verdict for corruption against mining tycoon Beny Steinmetz nearly ends the decade-long legal fight over Guinea's Simandou iron ore resources, the largest and best quality in the world. Two international consortia are set to produce ore at the site in 2027, some 30 years after the extent of the resources was first identified, according to industry sources and Switzerland's UBS bank.