Nuggets and seawater : Nuggets are an
exception, but account for the tiniest portion of discovered gold.
Interestingly there is also gold in solution in seawater, however although the
aggregate quantity is large (because the oceans are huge), the concentration is
low and renders extraction beyond any reasonable technology. The cost of pumping
1000 tonnes of seawater for processing would considerably exceed the tiny amount
of gold it would yield.