Ingesting calcium from oyster shell suppliments is supposedly unhealthy from the high lead levels. Filter feeders concentrate the heavy metal in their shell.
Now, to be sure, Pb is more reactive than Au and the concentration is much higher in many oyster beds.
Moreover, years ago I calculated the cost of energy to pump water through a fat short pipe and it came out to be worth more than the gold in the same amount of seawater.
But times change. The entire world is wired so the credit crisis ain't gonna be "solved" by a 1930s style Great Depression + killing 50 million in a world war. Instead they are gonna have to go the inflation route. (Sorry, Bernanke, well trimmed facial hair will only get you so far.)
Gold will soon be worth $2K/oz.
Is anyone working on this?
If sea water doesn't work I know where to get lots of water with much higher concentrations of gold.
You might want to get your seafood somewhere else, however.
Bret Cahill