Child Neglecter

Well, a 1 kilo gold bar is currently worth about $65k, so... 

If 9 gold bars makes a 1 meter by 1 meter block of gold, and 1 cubic meter of gold weighs 19.3 tonnes, that means that each minecraft gold bar is 2.14 tonnes in weight, making it 2140kg. As such, a gold bar would be worth, if 1 minas was 1 dollar, $139,100,000, and so 139 million, 100 thousand minas.

A gold nugget would cost 15,455,555 minas/dollars. 

Let's make it happen.