-never mind the numbers, i was overthinking it-
kallisto: large amount of uranium, small amount of cobalt-nickel, small amounts of coal and oil
ska: a large amount of coal, small amount of oil, large amount of metals
darvincia: large amounts of coal deposits
aeridani: a medium amount of coal and a large amount of metal deposits
bongland: a medium amount of iron deposits
swonxland: a medium amount of uranium, metals, and precious metals