Why is gold valuable?. You cant eat it, you cant drink it, you cant smoke it. Its just a dead stone. I guess it could make a solid wall, and is conductor of electricity, but if was stranded on a island im sure anyone would take a hamburger over a kilogram of gold. Whats the difference between a red, brown, blue, white, black, gold, yellow rock that does nothing? I guess its same with diamond. They do nothing as well, probably the most useless material in the world. There is not enough of it to do anything great either.