Where does the gold came from?

Gold has been known from prehistoric times and was possibly the first metal used by humans. It was valued for ornaments (see goldwork), and magical efficacy was attributed to it. In the Middle Ages alchemists sought to transmute baser metals into gold. The quest for gold stimulated European explorations and conquests in the Western Hemisphere, and its discovery has led to many a gold rush. Much of the gold now extracted is used for jewelry. The chief producers are South Africa, the United States (especially in Nevada and Alaska), Australia, Canada, Russia, China, Brazil, Uzbekistan, Papua New Guinea, and Indonesia. For a discussion of the monetary function of gold, see bimetallism; coin; international monetary system; money.

its mineral ore from earth...........

alot of people now a days are smart enough to take ordinary things and make gold detectors out of them.. then they jus use them to get the gold from lakes and mines