Palladium can be separated from polyxene by the process of resolving polyxene,removing nitrate,precipitating palladium,etc.The grade of pure platinum obtained from the process is more than 99.95%.
Indeed, the discovery of a layer of iridium-rich rock (iridium being one of platinum's relatives) was the first sign geologists found of the asteroid impact that is believed to have killed the dinosaurs.
Africa is incredibly rich in natural resources possessing ninety percent of the world's platinum, fifty percent of its gold, fifty percent of its diamonds, and another thirty three percent of its uranium.
A company called " Planetary Resources" estimated in 2012 that the platinum mined from a small 30 meter wide asteroid could be worth somewhere between 25 and 50 Billion dollars at current market value.