75% of America's Gold

Nevada produces about 75% of all gold mined in the United States and is the fourth largest gold-producing jurisdiction in the world, behind only China, Australia, and Russia. The Carlin Trend in northeastern Nevada, discovered in 1962, is the second largest gold-producing region on earth. Nevada gold is largely invisible to the naked eye, scattered in microscopic particles through vast deposits of rock rather than veins. The technology to extract this microscopic gold economically was not developed until the 1960s, meaning enormous wealth sat untapped for decades.

Source: Wikipedia