The Comstock Lode
The Comstock Lode is similar to the California Gold Rush, because of the golden discoveries they found (gold, of course). The Comstock Lode happened in Montana, Colorado, and Arizona, and all of this chunks of gold made this nation (United Sates) one of the most wealthiest! The gold and silver's value was 1 billion 2.5 million dollars in gold and silver, that's a lot of gold and silver, ain't it? This is one of the oldest mineral strikes, also called "The Granddaddy of them all."
(I made a paragraph of my own, but my source is: www.truewestmagazine.com/ten-events-that-shaped-the-west/