High quantities and values have been claimed for the Platinum and other high value metals in Asteroids - prompting (or perhaps in order to prompt) interest in mining them. Is this high value metal distributed within (alloyed with) nickel-iron or does it take other forms? My (admittedly limited) reading suggests the estimates would be based on presence within the nickel-iron in meteorites, as those have the highest platinum content, which (IIRC) can exceed 100ppm.
Making alloys is easy but unmaking them is usually much more difficult. Are there low cost methods for extracting these metals from nickel-iron? If not, other kind of ores, even at lower concentrations, may have greater potential by being easier to process. Whilst not strictly exaggeration, failing to note that these metals may be very difficult and uneconomic to extract - even on Earth without the added difficulties - does seem misleading.